The water availability effectiveness in weirs

Abstract

The Availability of water for irrigation is critical in the sustainability of crops. One of the primary water sources to maintain and even increase yields is the river. Mount Galunggung has many sources of water. Cibanjaran River is one of the rivers that originate on Galunggung mountain used to flood an area of 595 ha of rice fields. At present, the river has undergone silting due to sand mining activities next to the weir. The purpose of this study is to determine the effectiveness of the available discharges in the river in meeting the needs of the rice fields that are due to river sedimentation. Available data processing methods are used to analyze the availability and needs of water. Planting plan in November, water requirements in the rice fields are 1.5 lt/sec/ha. The available discharge is not able to meet the needs of 595 ha of rice fields. River sedimentation due to sand mining upstream affects the availability of water because a lot of water overflows above the spillway so that it cannot be utilized. The use of a group system and scheduling water supply provides the right solution in the distribution of water.