IRRIGATION WATER NEEDS ANALYSIS IN THE TRANI IRRIGATION AREA

Abstract

The Trani Irrigation Area is one of the weirs in Central Java Province, specifically in Sukoharjo Regency and Karanganyar Regency. Along with population growth, land use changes to residential areas. So it is necessary to analyze irrigation water needs in the Trani Irrigation Area. The aim of this research is to determine the number of physical infrastructure/building assets in the irrigation network, to determine the area of the Trani Irrigation Area, to determine the maximum amount of irrigation water requirements and minimum irrigation water requirements in the Trani Irrigation Area using manual calculations (KP-01 method ). From the research results, the results obtained include that Trani Dam has a total of 237 physical infrastructure building assets. Most of the physical infrastructure is in good condition and can still function well . The results obtained for the area of the Trani Irrigation Area are 1486.7 Ha using the help of Google Earth. The maximum irrigation water requirement for rice plants was obtained at 5.99 m ³ /second in the first period and in the second period in December . The minimum water requirement for rice plants was obtained at 2.16 m ³ /second, namely in the first period in February . Meanwhile, for calculating the maximum irrigation water requirement for secondary crops occurs in the second period of July, namely 4.32 m ³ /second and the minimum irrigation water requirement for secondary crops occurs in the second period of October, namely 0.82 m ³ /second