Perhitungan Dimensi Saluran Proyek Irigasi Bajayu di Kabupaten Serdang Bedagai (Studi Kasus)

Abstract

Determination of water requirements in rice irrigation project is a final planning of irrigation schemes. Indonesia is located in the area that the equatorial regions that have two different types of climate and high rainfall is one of the natural resource potential for development, and therefore the State of Indonesia is often refferd to as an agrarian country where the lives of the people of Indonesia is an agricultural life. Along that Indonesia also has a lush tropical forest that covered by many types of plants that can be developed. Bajayu dam irrigation project are located in Serdang Bedagai and Tebing Tinggi area north sumatera, is one of the giant project in North Sumatra, where irrigation may irrigate rice fields that have an area of ± 7.558 ha with special wide 45 ha side and Sei Padang irrigation 4000 ha. Authors try to evaluate the dimensions of irrigation networks and buildings that exist on the networks for irrigation if the channel is still sble to drain the whater in accordance with the required water discharge. Furthermore, to calculate evaportranspiration using penmann method modified calculation of water requirements for land preparation using methods developed with the use of curved tegal coeffesient, normal water needs in rice irrigation obtained (a) = 1,71 I /det / ha. To know the level of discharge mainstay available on the source water sampling water needs will be determined by the calculation analysis of channel dimensions will be obtained.An analysis that the dimensions of the channel are also other auxiliary to drain the water in accordance with the requirements irrigations water needed