Analisa Kebutuhan Air Irigasi D.I Batang Sinamar, Lintau Buo, Sumatera Barat (Penelitian)

Abstract

First step to do this thesis is the analysis of rain fall hidrology from climatology station of Sicincin Padang with maximum data for 10 years from 2006-2015. The objective of the research was to analyze the irrigation water requirement of Batang Sinamar, Lintau Buo, Irrigation Area based on the climatic data. The amount of irrigation water requirement for paddy was determined by some factor such as the water requirement for land preparation, plant growth, percolation and seepage, water level replacement, and effective rainfall. The result of research proved that irrigation water requirement for land preparation 1 month is 1,388 l/s/ha and are found on early may and water requirement for land preparation 1,5 month is 1,337 l/s/ha and are found on early july. Meanwhile maximum evapotranspiration are found on july as much as 6,165 mm/hari. The irrigation requirement is basically able to be fulfilled by effective rainfall