Drainage design on peat land and its utilization for fish culture

The utilization of drainage technique developed by Hooghoudt and Ernst since 1940 can be applied for lowering ground water surface. Water in the drainage canal is able to be used for fresh water fish culture. Horizon Layer of Homogeneous Peat Soil has a hydraulic conductivity as high as 4.5 meters per day. The distance between drainage canals is 118 meters. Drainage water debit for every 23,600 square meter of land is 23.76 liters per minute. Horizon Layer of Heterogeneous Peat Soil has a hydraulic conductivity of peat soil as first soil layer as high as 4.5 meters per day and a hydraulic conductivity of sandy loam as second soil layer as high as 0.8 meters per day. The distance between drainage canals is 329 meters. Drainage water debit for every 65,800 square meter of land is 66.25 liters per minute. When the pH of the water has reached 5 up till 6, then spreading the fish seed can be conducted. Some types of fish that have been introduced in the peat land water are Patin Siam (Pangasianodon hypophthalmus), Lele Dumbo (Clarias gariepinus) and Nila (Oreochromis niloticus). Furthermore, the introduced fish into the peat land water must have an economic value for the people who grow the fish.