The document discusses water table management techniques under the System of Rice Intensification (SRI) method. It introduces two SRI planting patterns called JARWO 2x1 and JARWO 4x1 that use different spacing between rice plants. It also presents two types of JARWO planting machines: two-wheeled and four-wheeled versions. The document provides a water balance equation that models the water level based on factors like rainfall, evapotranspiration, percolation, water flow, irrigation, and drainage. It aims to minimize water flow and constrain the water level between 0-5 cm.

1. WATER TABLE
MANAGEMENT UNDER SRI
Budi Indra Setiawan
Chusnul Arif

2. SRI WITH JARWO PLANTING PATTERN
JARWO 2x1 JARWO 4x1

3. JARWO PLANTING MACHINES
TWO-WHEELS FOUR-WHEELS

4. WATER BALANCE
20 cm
40 cm
h=0–5 cm
et
r
p
q q
𝑑ℎ
𝑑𝑡
= 𝑟 − 𝑒𝑡 − 𝑝 + 𝑞
𝑀𝑖𝑛𝑖𝑚𝑖𝑧𝑒 𝑞
𝐶𝑜𝑛𝑠𝑡𝑟𝑎𝑖𝑛𝑡 0 ≤ ℎ ≤ 5
𝑞 = 𝑖 − 𝑑
r: rainfall; et: evapotranspiration; p: percolation; q:waterflow; h:water level; i :irrigation;
d: drainage; Ef: emission factor; Ce: emitted carbon; Ca: absorbed carbon.
𝐸𝑓 =
𝐶𝑒
𝐶 𝑎

7. THANK YOU