1. EXECUTIVE SUMMARY
LAND USE DIRECTION BASED ON ENVIRONMENTAL GEOLOGY ASPECTS
IN NGADIRGO, WONOLOPO AND WONOPLUMBON SUBDISTRICT
Created To Fulfill Environmental Geology Subject Task
(TKP 250)
Lecture :
Ir. Hadi Nugroho Dipl. EGS, MT
By :
Group IA
Renny Desiana 21040112130051
Dwitantri Rezkiandini 21040112130071
Aulia Adhiyajna F. 21040112130089
Ferdianta Wahyu N. Pratama 21040112130097
Oktaviana Rahayu J.A. 21040112130099
Yosephine Purba 21040112140041
Fajar Hadhiyanto Wibowo 21040112140125
DEPARTMENT OF URBAN AND REGIONAL PLANNING
FACULTY OF ENGINEERING DIPONEGORO UNIVERSITY
SEMARANG
2013

2. ii
TABLE OF CONTENTS
TABLE OF CONTENTS ……………………………………………………………….. ii
TABLE LISTS ……………………………………………………………….. iii
CHAPTER I INTRODUCTION ……………………………………………………………….. 1
1.1 Background ……………………………………………………………….. 1
1.2 Issues ……………………………………………………………….. 2
1.3 Goals and Purposes ……………………………………………………………….. 2
1.3.1 The Purposes ……………………………………………………………….. 2
1.3.2 Target ……………………………………………………………….. 2
1.4 Scope ……………………………………………………………….. 3
1.4.1 Regional Scope ……………………………………………………………….. 3
1.4.2 Scope of Content ……………………………………………………………….. 3
1.5 Methodology ……………………………………………………………….. 3
1.5.1Data Collection
Methods ……………………………………………………………….. 3
1.5.2 Analysis Methods ……………………………………………………………….. 4
CHAPTER II DISCUSSION ……………………………………………………………….. 5
2.1 Regional’s
Characteristic ……………………………………………………………….. 5
2.1.1 Geographical
Location ……………………………………………………………….. 5
2.1.2 Physically
Characteristic ……………………………………………………………….. 5
CHAPTER III CONCLUSION ……………………………………………………………….. 18

3. iii
TABLE LISTS
Table II.1 SWOT Analysis Ngadirgo
Village, Wonolopo and
Wonoplumbon
……………………………………………………… 11
Table II.2 Slope Analysis Ngadirgo
Village, Wonolopo and
Wonoplumbon
……………………………………………………… 12
Table II.3 Analysis of Rainfall Village
Ngadirgo, Wonolopo, and
Wonoplumbon
……………………………………………………… 12
Table II.4 Analysis of Slope Village
Ngadirgo, Wonolopo, and
Wonoplumbon
……………………………………………………… 13
Table II.5 SWOT Analysis Ngadirgo
Village, Wonolopo, and
Wonoplumbon
……………………………………………………… 14

4. 1
CHAPTER I
INTRODUCTION
1.1 Background
Environmental Geology is essentially a science of applied geology in an effort
aimed at utilizing natural resources and energy efficiently and effectively to meet the
needs of human life in the present and the future by reducing the environmental impact
caused as much as possible (Iqbal, 2011). Meanwhile, according to Hrasna (2002), states
that with respect to the original definition of the environment, the Environmental Geology
can be defined as part of the lithosphere, which directly affects the condition of the
existence and development of society, people who exploit and which converts the
environment.
From the above statements, it can be concluded that Environmental Geology is a
science which to study the relationship between aspects of geology, natural resources,
and human being. This relationship takes part in solving the problems of land use, minimize
disasters that may occur due to human activities, and maximizing the potential of existing
resources in a region.
Environmental Geology Science has nine aspects of geology consisting of
morphology, topography, lithology, geological structure, stratigraphy, hydrology,
climatology, hydrogeology, and geologic hazards. These aspects will provide an important
information for planning the world. The real benefit of the geological aspects is as a guide
in determining aspects of land use of an area. By considerations of this geology aspects,
land use mapping of an area is expected can be optimal, and can reduce the environmental
impact that could arise in the future.
Based on the descriptions above and seeing the physical circumstances in District
Mijen, so it will need a further assessment of the function of land use in the District Mijen,
particularly in sub-villages which serve as study area that is Ngadirgo Village, Village
Wonolopo, and Wonoplumbon Village. Green open space area is dominating several
villages in the district Mijen. One of the problems that can be studied further is the
conversion of green open space into residential areas. Many residential areas were built in
the green open space that are not really suitable to be conversed as it is.
1

5. 2
With a more depth and detailed assessment to the sub-urban villages in the study
area, is expected to provide a major contribution to the development in those sub-urban
villages. Assessment which based on the environment al geology aspects would make a
future planning will be done more sustainable so that all kinds of geological hazards that
may arise in the future will be minimized.
1.2 Issues
The problems which being the main focus of this paper is on the direction of land
use in accordance with aspects of environmental geology in the Ngadirgo Village,
Wonolopo Village, and Wonoplumbon Village so that development can be done more
attention to environmental aspects and to minimize hazards that could occur in the future.
This problem can be analyzed through analysis of land suitability analysis is based on
referrals and Spatial Planning (Spatial) as determined by the relevant government, the
Regional Planning Board of Semarang. The land suitability identification of study area
based on the potential and constraints of the geological aspects found in the field, namely
morphology, topography, lithology, geological structure, strartigrafi, hydrology,
climatology, hydrogeology, and geologic hazards.
1.3 Goals and Purposes
1.3.1 The Purposes
The purpose of making this paper is to analyze and identify the physical condition of
Ngadirgo Village, Wonolopo Village, and Wonoplumbon village in the Mijen district so
as to provide a proper land use guidance which appropriate land use analysis and land
suitability function of the area in accordance with the geological aspects.
1.3.2 Target
1. Analyze the study area borders and the state of the study area in general.
2. Analyze the study area issues which are related to environment al geology aspects.
3. Identify environmental geology aspects in the study area including morphology,
topography, lithology, geological structure, stratigraphy, hydrology, climatology,
hydrogeology, and geologic hazards.
4. Assess the area function of the study area.
5. Analyzing potential and constraints in the study area according to their natural
condition.

6. 3
6. Provide recommendations based on the function of the area, the potential and
constraints in the study area.
1.4 Scope
1.4.1 Regional Scope
The scope are Ngadirgo Village, Wonolopo Village, and Wonoplumbon Village. These
villages are part of the Mijen district. Ngadirgo Village broad is 10.01km2
, Wonolopo
Village broad is 2.21 km2
, and Wonoplumbon Village broad is 6.80 km2
. These three
villages have administrative boundaries, namely:
- North : District Ngaliyan
- South : Village Jatisari
- West : Kendal
- East : Village Pesantren
1.4.2 Scope of Content
The material discussed in this paper is the physical state of Ngadirgo Village, Wonolopo
Village, and Wonoplumbon Village, District Mijen, Semarang based on geological
aspects, namely:
- Morphology
- Topography
- Lithology
- Geological Structure
- Stratigraphy
- Hydrology
- Climatology
- Hydrogeology
- Geological Hazards
1.5 Methodology
In the discussion and preparation of this paper using two methods, namely:
1.5.1 Data Collection Methods
Data that required in the preparation of this paper is the primary data and secondary
data.

7. 4
- Primary Data
Primary data is data which collected directly by the researcher of the respondents,
not derived from data collection has ever done before. Primary data collection
techniques can be done through questionnaire, interviews, focus group
discussions, and observations.
- Secondary Data
Secondary data is data that has been collected by someone else and not prepared
for the preparation of the paper, but can be used for data collection purposes.
1.5.2 Analysis Methods
The analysis method consisted of quantitative analysis and qualitative analysis.
- Quantitative Analysis Method
This analysis used an analytical tool in numeric form, namely scoring factor that
serves to determine the function of the area based on existing scores. The
variables included in the scoring factors are topography, climatology, and
lithology.
- Qualitative Analysis Method
This analysis is used to analyze the data in the form of non-numeric or data that
can not be translated in the form of numeric variable. Variabel that using
qualitative analysis methods, namely structural geology, stratigraphy, hydrology,
climatology, hydrogeology, geological hazards and land use. analysis tools can be:
a. Descriptive analysis, the data processing is done by giving a description of the
study area.
b. Normative analysis is used to analyze the study area using the provisions or
regulations.
c. SWOT Analysis, is a method used to determine and analyze Strength,
Weakness, Opportunity, and Threat.

8. 5
CHAPTER II
DISCUSSION
2.1 Regional’s Characteristic
2.1.1 Geographical Location
The total area of Ngadirgo, Wonolopo and Wonoplumbon village is 19.02 km2
with
administrative boundaries, namely:
- North : District Ngaliyan
- South : Jatisari Village
- West : Kendal Regency
- East : Pesantren Village
2.1.2 Physically Characteristic
a. Morphology
The morphologic type of Wonolopo, Ngadirgo and Wonoplumbon Village
composed of rather flat, wavy and hilly. With the landscape form is structural ramp
hill with denudational process. Geomorphic units namely hills geomorphic with the
slopes ranging from 2 -15% and has a height of 30-500 asl. This area is suitable for
agriculture and plantations, but the areas that have been denunationed has a
disadvantage, it is the binder composition of rocks and soil is not compact, so it will
be susceptible to weathering, erosion and landslides.
b. Topography
Wonolopo, Ngadirgo and Wonoplumbon Village have topography level with a
slope which is divided into five sections, namely:
- Flat areas with slope 0-8% found in the eastern part of the Ngadirgo Village.
This location is suitable to utilize as an area settlements.
- Sloping areas with slopes level of 8-15% is located in almost parts of the village.
Region with a slope level of 8 -15% is cultivated area, that could be used for a
wide range of human activities depend on the physical conditions. Generally,
this area is used for residential, farm and moor
- A rather steep region with slopes level of 15-25% is located in almost of the
Wonoplumbon village, and several western parts of Ngadirgo and Wonolopo
village. This region is utilized as production forests and plantations, this are is
5

9. 6
a useful buffer to place water flows and also maintains the characteristics’ of
protected areas. There are also settlements in some regions, this location is
not true at all, because it will be vulnerable to avalanches even just for a small
frequency.
- A rather steep Region with slopes levels 25-40% located in the south of
Wonoplumbon village. This area can be used as buffer zones or protected
area, but in Wonoplumbon Village, it used for the buffer zone. This region
relatively close to the river that used by citizens for garden, this area is very
prone to soil erosion in the river cliff.
- Areas with very steep slopes > 40% there is little area in the southern part of
the Wonoplumbon village. This area is suitable as a protected and buffer area.
But at the Wonoplumbon Village can only be used as regions of the
plantations, forests and agriculture.
-
c. Lithological
There are 2 types of rocks in the Ngadirgo, Wonolopo and Wonoplumbon
Village, both rock types are:
a) Basic Sedimentary Rocks
One type of this rock is sandstone, which is found in the northern part of the
Ngadirgo and Wonoplumbon village. Some kinds of these rocks are
sedimentation of clay, silt rocks, sand rocks. Characteristics of these rocks is
not having a strong tie between the rocks matix, so it does not fit established
buildings, especially the clay rocks in Blorong River in Wonoplumbon is highly
unstable.
b) Volcanic Rock Breccia
These rocks are located throughout Wonolopo Village, and the southern part
Wonoplumbon and Ngadirgo Village. These rocks has spread most widely in
Ngadirgo Village, Wonolopo Village, and Wonoplumbon village.
There are 2 types of soil are scattered in the Village Ngadirgo, Wonolopo
Village, and Village Wonoplumbon. The second type of soil it is:
a) Latosols Reddish Brown
This type of land scattered throughout the entire territory Village
Wonoplumbon and Ngadirgo and most areas of the Wonolopo Village. Latosols

10. 7
reddish brown is the most dominant soil types in the Village Ngadirgo,
Wonolopo Village, and Wonoplumbon Village.
b) Latosols Brown
Distribution of soil types is not too broad. Latosols brown soil types found at
the Village tenggar Ngadirgo.
The soil fertility ranged from moderate to low, but the land latosols have a
high level of soil productivity due to a soil that is loose. In the village Ngadirgo,
Wonolopo and Wonoplumbon most of the lands used for plantations, moor
and forest. For use as paddy fields, latosols soil can be utilized optimally when
its location was around the river banks. latosols is good enough in retaining
water and erosion and good enough to get up in the building there on, except
large-scale manufacturing because in the dry season the soil is very susceptible
to evaporation that causing less solid constituent elements of the matrix and
causing landslides.
d. Geological Structures
Geological structures contained in the Village Ngadirgo, Wonolopo and
Wonoplumbon according to spatial maps and Geology Map sheet Semarang-
Magelang is a geological fault structure. The fault lines transverse section headed
southwest to the north village Wonoplumbon and turn to the west and south
Ngadirgo and Wonoplumbon village. In the existing situation, can not find the
original formation of the fault, but the fault indication can be identified in the river
cliffs which resulted in a sharper bend in the river. Geological structures that can be
found in the geological structure Wonoplumbon are stout on the rocks in the
border river silt Blorong.
On the fault lines in the west to the east village Ngadirgo, not so according to
established buildings, regardless of the possibility of shifting earth or landslides,
but more due to this fault line has a fairly steep slope level with the middle ground
motion. But the fault lines in the southern village Wonoplumbon still be sought to
build residential buildings such as the condition of relatively flat terrain with the
type of ground motion is very low. However, the point of the construction site
should be far from the border river Blorong to minimize the occurrence of

11. 8
landslide hazards by the brunt of the river flow is sufficient. For ground
movement, is divided into three, namely:
- Very Low Movement, located on the slopes of <15% are in almost Wolopo,
Ngadirgo and Wonoplumbon areas.
- Low Movement, situated in 15% - 25% area that is in a minority in Wolopo,
Ngadirgo and Wonoplumbon village.
- Middle Movement, located on the slope ramps 8-15% to the steep 25-40%
spread Nagdrgo, Wonolopo and Wonoplumbon.
-
e. Stratigraphy
Formations that are found are Kaligetas Formation with the main rock
constituent is breccia, tuffaceous sandstone and clay rocks. Clay rocks and breccia
rocks can be found east of the river Blorong or around the river banks. In addition,
there is also a rock formations Winch that form intercalation in the village
Wonoplumbon limestone rock breccia and conglomerate rock. Because most of
the stratigraphy in the Village Ngadirgo, Wonolopo and Wonoplumbon consists of
breccia and sandstone rocks, the building was set up especially for large buildings
should be done more in the assessment.
f. Hidrology
Surface water flow in the Village Ngadirgo, Wonolopo, and Wonoplumbon can
be seen on the river Blorong and Plumbon River. Blorong river flows along the
village Wonoplumbon with total length of the river is 93 km. Blorong river water
discharge in the dry season as much as 4.053 m3
/second, while the rainy season is
as much as 7,686 m3
/second. Watershed Blorong much more profusely and have a
fairly wide river length of about 3-5 meters. This condition is very good to be used
as agricultural areas that use irrigation water from the river to the state of the farm
remains in the wet conditions. Unlike the Blorong river, stream Plumbon quieter so
that in this region there exist any river settlement, discharge water does not pose a
hazard as erosion or landslides.

12. 9
g. Climatological
Climatological conditions in the Wonoplumbon, Wonolopo and Ngadirgo
village roughly equal to the entire state of climatology Mijen District. Have a total
average rainfall per year from 27.7 to 34.8 mm. With temperatures average
minimum measured in Semarang Climatology Station varies from 21.1 ° C in January
to 24.6 ° C in May, and the average maximum temperature varies from 29.9 ° C to
32.9 ° C. Monthly wind speed based on the average of Semarang BMKG station
varies from 215 km / day in August to 286 km / day in January. This condition is very
suitable for the cultivation of crops because the plants will get enough water
supply from rain water. Moreover, with a high amount of rainfall will also still be
able to optimize the utilization of wet farming.
h. Hydrogeological
Wonolopo, Ngadirgo, and Wonoplumbon village have hydrogeologic
characteristics local aquifers and productive. Middle productivity of aquifers are
found in all regions throughout the Village Ngadirgo Wonoplumbon, and most of
the village Wonolopo with water discharge of more than 10 liters / sec and has a
good water quality. Discharge water is good enough for the water used by
residents as a water resource of residential areas. To get water, digging wells to a
depth of 10-15 meters. In addition, the productivity of the aquifer are very suitable
to utilize wetlands for agriculture and also for the plantation. Meanwhile, there is a
local aquifer productivity at a fraction Village Wonolopo. The condition means that
the groundwater reserves in the Village Wonolopo somewhat not so abundant in
some parts. This condition is not suitable for agricultural use by utilizing ground
water, but rather used as irrigated agriculture by utilizing the river and also take
advantage of high rainfall.
i. Geological Hazards
Problems found in the Village District Mijen especially Wonoplumbon,
Wonolopo and Ngadirgo is ground motion. However, the ground movement are
relatively rare because the district Mijen generally are at low ground motion zone.
In addition, other geological hazards is related denudasional process that resulted
in rock weathering. This is due to weathering of soils and rocks do not have a

13. 10
holding capacity soil / rock solid or have high levels of compaction between the low
matrix. This will lead to erosion and landslide geological hazards, especially on
steep slopes.
j. Land Use
Aspects of land use contained in the Village Ngadirgo, Wonolopo and
Wonoplumbon consists of five types of land uses. Among them are permanent
production forest areas, plantation areas, farming, moor and settlements.
Production forest spread in every village, but in the area large enough to be in the
Village Wonoplumbon. Where in this village, the trees are planted in production
forest is a tree that can produce products, such as rubber tree rubber used by
citizens to be sold and used by residents teak wood for sale.
For this type of land use as plantations, widely used by residents to plant
some trees that do not have a big hard rod, such as for planting some vegetables
such as peppers and tomatoes, for cassava planting trees and some trees such as
betel vine and others. Where to watering this plantations, residents take
advantage of the river flow and flow Blorong Plumbon river which flows through
the three villages. Similarly, land use as plantations, pa da agricultural land that is
widely available in the Village Ngadirgo and Wonolopo also use the river, the river
flow Plumbon. So that kind of rice fields in two villages there is more directed at
the irrigated water supply does not depend on the intensity of rainfall. Many types
of plants grown by the residents is rice. Which is a very suitable time to plant rice
during the rainy season is due to the amount of water to irrigate rice fields abound.
Land use is not much different from the dry land farming, but the land is
planted tree species more diverse. Surrounding communities utilize the dry land to
plant moringa trees, tree roots like galangal, turmeric and all kinds of tubers. While
land use settlements scattered in every village, but a large number of extents
present in Wonolopo Village. A large number of settlements in the affected villages
in this district because there Mijen district government offices, there Mijen markets
were trading centers in the District Mijen and there are also several other facilities,
such as banking. In the existing situation in the Village Ngadirgo, Wonolopo and
Wonoplu mbon also found that land use spatial violate the rules. Such as the
transfer function of land that had a teak tree plantation cleared for peanuts.

14. 11
Another problem is the people's houses in the buffer zone that should not be used
as a residential area.
k. Potential and Constraints
Table II.1
SWOT Analysis Ngadirgo Village, Wonolopo and Wonoplumbon
Internal
Eksternal
STRENGTH
1. Soil types Latosol who has a
pretty good level of fertility
2. There is a fairly heavy
Blorongwatershed flow
3. Prodektif aquifers are High
rainfall Cultivated area is fairly
dominate
WEAKNESS
1. Ground motion is less stable in
some places
2. Holding capacity is less solid
ground
3. Steep slope ramps level Prone
to landslides and bank
erosion.
OPPORTUNITIES
1. Regulations on land use clear
2. Improved technology in the
future
3. Increased investment or
investment
1. To do an agriculture-based
activities such as gardening,
farming. This is done in order to
increase the rate of the general
economy Mijen district.
2. Settlement can be made on the
basis tetapa cultivated area
with state government
regulations and environmental
conditions.
1. Establishing a partnership
between the government and
the private sector to
understand and comprehend
the physical condition of a
region that is done the
Development tertruktur and
still consider the physical
condition of the environment.
2. Development is done by
calculating the details of
cultural influences - such as the
dangers posed by utilizing
appropriate technology.
THREAT
1. Any land use that violates the
rules of spatial
2. The transformation of the area
around a watershed
3. The total population will be
growing
1. With increasing population, the
need for housing will increase,
determining the location of the
designated residential areas is
necessary, to conform to aspects
of land use has been determined
by the spatial and also according
to the physical condition of the
area to be used as the
settlement. In order to minimize
the danger that came in later.
1. Not doing destruction of
vegetation around the Sar river
to prevent erosion on river
banks. And also so that
watersheds can be maintained
existence.
2. Development is done should pay
attention to minimizing the
environmental aspects of
geological hazards that may
occur.
Source: Group Analysis, 2013
From the SWOT table above it can be concluded that the Village Ngadirgo,
Wonolopo and soil type latosols Wonoplumbon reddish brown and has a high
density of river water and continuous so that it can be used for plantation and
agriculture, while the relatively flat terrain can be utilized as a residential
development of the area. But there is also a river in the River bank erosion along
the Village Wonoplumbon Blorong, it happens because of river bank erosion by
water flowing from the top of a cliff or by the brunt of the strong flow of the river
bend in the river, so the area is located near the banks of the river is very

15. 12
dangerous if used as a settlement. Kelurahan Ngadirgo, Wonoplumbon, and
Wonolopo ground motion zone are at medium to very low is not so worrying,
because the circumstances existing at the sub-village could not be found or
identified the danger of a very large ground motion effects.
l. Scoring Analysis
Spatial analysis of the carrying capacity of this land is a consideration that is
used to determine the appropriate land use patterns for micro areas in the
northern part of the village Ngadirgo, the southern side Wonolopo, Wonoplumbon
western part and the eastern part of the village Ngadirgo. This analysis will provide
information about the suitability of land suitable for the region. To determine the
function of a local area we use analysis tool analyzes the scoring. Scoring is based
on analysis of the topographic slope aspect, namely the intensity of the rainfall
climatology on average, and the type of soil lithology. Benchmark used for scoring
analysis based on criteria derived from the table Ministerial Decree
No.837/KTPS/UM/II/1980 and No.683/KPTS/UM/VII/1981.
a) Slope Analysis
Slope analysis can be performed based on the table below:
Table II.2
Slope Analysis Ngadirgo Village, Wonolopo and Wonoplumbon
No. Class Slope (%) Description Score
1 I 0-8 Flat 20
2 II 8-15 Ramps 40
3 III 15-25 Kinda Steep 60
4 IV 25-45 Steep 80
5 V >45 Very Steep 100
Sources: Ministerial Decree No.. 837/UM/II/1980 and No.683/KPTS/UM/1981
b) Rainfall Analysis
Analysis of the magnitude of rainfall intensity can be done based on the table
below; very steep
Table II.3
Analysis of Rainfall Village Ngadirgo, Wonolopo, and Wonoplumbon
No. Class Interval (mm/day) Description Score
1 I 0-13,6/<1500-2000 Very Low 10
2 II 13,6-20,7/2000-2500 Low 20
3 III 20,7-27,7/2500-3000 Medium 30
4 IV 27,7-34,8/3000-3500 High 40
5 V >34,8/>3500 Very High 50
Sources: Ministerial Decree No.. 837/UM/II/1980 and No.683/KPTS/UM/1981

16. 13
c) Soil Type Analysis
Lithological types of soil analysis can be done based on the table below;
Table II.4
Analysis of Slope Village Ngadirgo, Wonolopo, and Wonoplumbon
No Class Type Description Score
1 I lluvial, Gley soil, Planosol,
Hidromorf Gray, Laterite Soil
Water
Sensitive 15
2 II Latosol Less Sensitive 30
3 III Brown forest, Non Caltic Brown,
Mediterania
Sensitive 45
4 IV Andesol, Latrik, Grumosol Sensitive 60
5 V Regosol, Litosol, Organol,
Renzina
Very Sensitive 75
Sources: Ministerial Decree No.. 837/UM/II/1980 and No. 683/KPTS/UM/1981
Based on the results of the scoring are made it is known the result of the
carrying capacity of the land area of the Village Micro Ngadirgo, Wonolopo,
Wonoplumbon can be concluded that in urban areas Ngadirgo, Wonolopo and
Wonoplumbon functions can be grouped into two areas, namely the function of
cultivated area and the function of the buffer zone. In the cultivated area can be
utilized for residential areas, plantation, dry land. Whereas in the buffer zone can not
be used as a residential area in the buffer zone is the area between cultivated areas
and protected areas, and therefore in the buffer zone functioned for planting more
trees and can not didirakan homes in the region.

17. 14
Table II.5
SWOT Analysis Ngadirgo Village, Wonolopo, and Wonoplumbon
Slope
Category
Score Rainfall Score Soil Type Score Total Score Function Area Location
0-2% 20
27,7-34,8
mm3
/hari
40 Latosol 30
90 Cultivation Ngadirgo Village
2-15% 40 110 Cultivation
15-25% 60 130 Buffer
2-15% 40 27,7-34,8
mm3
/hari
40 Latosol 30
110 Cultivation
Wonolopo Village
15-25% 60 130 Buffer
2-15% 40
27,7-34,8
mm3
/hari
40 Latosol 30
110 Cultivation
Wonoplumbon
Village
15-25% 60 130 Buffer
25-40% 80 150 Buffer
>40% 100 170 Buffer

18. 15
d) Land Suitability Analysis
Based on the analysis of the spatial aspects of rainfall, soil type and slope in
the scoring analysis, and also based on the Spatial Plan, it will get the land
suitability analysis of the Village Ngadirgo, Wonolopo and Wonoplumbon form
of cultivated area and the buffer zone. Cultivated area in the Village Ngadirgo,
Wonolopo and Wonoplumbon a function of the area's most dominating. This
corresponds to a state of relatively flat terrain to sloping, ie sekitr 0-8% and 8-
15%. In accordance with the nature and characteristics of the slope ramps that
do not have the high ground motion, so its presence does not threaten
anything that was on it. While based on level terrain, cultivation area is also
caused due to the condition of the land in this district is latosols ground.
Latosols land is land which is very supportive for use in all aspects of life,
because soil formation latosols compact, unlike clay which would be unstable
because of the influence of hydrology and weather around it, making it very
dangerous to something that is on it. Latosols land is suitable for use as a
plantation, agriculture, permanent production forests and settlements.
As for the buffer zone is more prevalent in the village Wonoplumbon. This
happens because kelerangan in this village is relatively steep with reddish
brown landfills latosols nutrient rich, so that the region is more suitable to be
developed as a plantation forest and land management that does not require
so large. This buffer serves to awake tetapa characteristic protected areas.
In the existing circumstances, there are some areas that occurred over the
function. Buffer zone which should only be used as a forest with no human
intervention in the portion of a lot, but in the Village Wonoplumbon some
experience cutting teak forest area for conversion to plantation residents, such
as corn and peanuts. Another problem is also the settlements that should be in
the region but is cultivated in the buffer zone.
Direction of the new land use that can be compiled in this report include the
direction of agricultural land use, land-use residential referrals and referral
procedures for trafficking.
1. Referrals Land Use Settlements
Direction of new settlements on land use over and put on
Wonoplumbon Village in the Village Ngadirgo the number is not so

19. 16
great. Determination Wonoplumbon village settlements in the region
considering the physical aspect, such as aspects of environmental
geology, aspect and the aspect of the river where the road
infrastructure. Determination of the area of new residential land use in
the Village this Wonoplumbon sought to be placed in areas that are
relatively flat. It is characterized by the relative distance of the contour
lines away.
Selection of this flat area to avoid geologic hazards can occur at
any time. Areas with steep slopes, will likely cause problems later on.
One of the geological hazards are avoided is the danger of landslide
geological and soil movement. Selection of new settlements was also
noticed other geological aspects such as whether there is a major fault
line trajectory. Areas that are in the path of major faults can lead to
problems such as soil movement and landslide hazards. In addition, site
selection is also based on the location of the road. Position that
settlements are a bit away from arterial roads will provide comfort for
the occupants as it can avoid the noise. And in this location, type of
course is a collector street that day-to-day was not so crowded with
vehicular traffic. The next consideration is the location of the remote
location of the River Plumbon, this is done in order to minimize any
hazards such as erosion, landslides and overflowing rivers in the rainy
season. As for the residential land use in the Village Ngadirgo is one of
the new settlements that have been built by the developer Bukit
Semarang Baru. This settlement is located on the roadside despite
artery, but the street is not crowded so it does not cause noise on
residents in these settlements.
2. Referrals Agricultural Land Use
Direction of new agricultural land use is intended to increase the
utilization of river water flow is in the Village Wonolopo and
Wonoplumbon. Some land was vacant land or moor is located in the
Village Wonolopo be converted into agricultural areas irrigated with
river flow utilizing Plumbon. So it is with some forest and plantation
areas hard hit in the Village Wonoplumbon can be recovered into

20. 17
agricultural areas irrigated with river water flow utilizing Blorong are
quite heavy.
The presence of soil types latosols very suitable for use as
agricultural land if supplied with adequate irrigation water, the soil will
make it more productive. With the use of this, the level of the people's
economy is expected to be better with the new job as a farmer. For
agricultural land located in the Village Wonoplumbon swale system
because the slope is quite steep.
3. Referral Trade Land Use
The only trading center located in the Village Ngadirgo, Wonolopo
and Wonoplumbon is Mijen market. Due to the increasing number of
people who reside in these three villages, it is necessary to build new
trade centers that are accessible to all residents, both derived from the
Village Ngadirgo, Wonolopo and Wonoplumbon. New trade center is
placed in the middle area of the Village Ngadirgo, Wonolopo and
Wonoplumbon. Construction of trade center is a follow-up of the
construction of new settlements in the Village Wonoplumbon. This is
because the distance between the village Wonoplumbon Mijen market
is quite far away. So with the new trade center, day-to-day needs of
residents in the surrounding village Ngadirgo, and in particular the
Village Wonoplumbon Wonolopo can be more easily met.

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BAB III
CONCLUSION
Based on the results of the discussion and analysis of the data obtained in the field, it
can be concluded as follows:
Ngadirgo Village, Wonolopo Village, and Wonoplumbon Village has an area about 19.02
km2
with rainfall levels from 27.7 to 34.8 mm / year. Most of the geological conditions is
dominated by sandstone and breccia from the formation of resin and kaligetas formation. Area
of the research is an area of the fractures structure and fault, landforms largely a hilly area.
Land use in the study area is dominated by plantations and forests. The type of soil that can be
found is the reddish brown latosol with sandstone and breccia as its constituent. Area of the
study is an area of the aquifer with moderate productivity and drained two rivers, Plumbon
River and Blorong River.
Based on the geological aspects of the physical state in the Village Ngadirgo,
Wonolopo and Wonoplumbon, it can be automatically conclude the potential and constraints
that are contained in the three villages. Geological potential in Ngadirgo village, Wonolopo and
Wonoplumbon is latosol soils that have a high nutrient, found in two watersheds that have
high water discharge and groundwater conditions with moderate productivity. While the
constraints contained in Ngadirgo village, Wonolopo and Wonoplumbon is the ground
movement ranging from low-to middle-ground movement which at times can lead to the
occurrence of landslides.
Related to geological aspects as well as potential and constraints in Ngadirgo Village,
Wonolopo and Wonoplumbon with urban and regional planning, then it will get an suitability
output of land where the village Ngadirgo, Wonolopo and Wonoplumbon have suitability of
land as a cultivated area and the buffer zone. At existing circumstances, cultivation area in
Ngadirgo, Wonolopo and Wonoplumbon widely used by residents as residential areas, farms,
plantations and fields. As for the buffer zones were encountered at Blorong River flow area
used as a non-production forest and production forest.
18