Evaluation of Multi-Function Drainage Channels For Running Water Fish Culture For The Benefit of The Community In Pangururan District

Pangururan Subdistrict in Samosir Regency requires rearranging its open land functions related to the meaning of environment. From civil engineering perspective, landslides can occur suddenly during rainy season without being noticed by people around sub-district, Regency. To realize this program, community add function drainage channel into a mobile fish pond Subdistrict, Regency, which still has large area land/settlements become running channel. This increase residents' income is beneficial for canal. In addition, problem overflowing water will be minimized. implement an analysis should prepared advance evaluate that as District, line with government's program promoting and increasing residents, existing channels utilized. Unproductive productive cultivating freshwater along while simultaneously irrigating rice fields. Therefore, wet section plan made 1000 meters where condition planned according analysis. The depth ponds 100 170 cm width top side from 150 cm, sides below cm. Based on calculations, first process must done calculate maximum rainfall, discharge, dimensions channel, flood discharge (designated discharge), QT = 0.278 x C I A 6.69 m3/s at speed average flow. flow velocity installed sluice so value 1/n R2/3 S1/2 3.8 m/s, cross-sectional cross-section b 1.904 m2, making design QS AS V 7.23 calculation gates 50 height Q (u ) 3 10.8 m/s.