PERENCANAAN DRAINASE BAWAH PERMUKAAN LAPANGAN STADION MENAK SOPAL TRENGGALEK

Drainage is a infrastructure that has a function to drain excess water from an area to the receiving water body which aims to make the land area function properly, the water receiver can be a natural or artificial water container in the form of rivers, seas, infiltration wells, reservoirs, and other absorption facilities that are environmentally friendly. Menak Sopal Stadium is a multipurpose stadium, in Trenggalek Regency itself this stadium is the headquarters of the Persiga Trenggalek football club, for the convenience of utilizing stadium field infrastructure, proper drainage system planning is needed so that puddles do not occur on the field, and rainwater runoff can be absorbed and drained through drainage. This planning is done to find out how much rainfall design 10-year return period, subsurface drainage system and know the distance of the pipe, and to find out how the planning of surface drainage systems, complementary buildings. The results of the planning analysis, obtained 10-year return period design rainfall (R_10) of 166.301. Soil porosity sebsar 0.31 and infiltration rate of 100 mm / hour. The time required for the soil to dry as before is 125.337. For the diameter of the results of the analysis, the diameter of the subsurface geopipe is Ø150 mm, for the dimensions of the surface drainage which functions as a catchment for runoff from the subsurface pipe and from the running track and stands of b = 800 mm and h = 400 mm.