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百色市下辖的右江区、田阳县、田东县和平果县4个县(区)位于右江河谷山区,是广西著名的桂西北大石山区干旱片区。受地理、地质条件的影响,区域内山高坡陡,土壤覆盖层薄,土地涵养水量能力低,地表水资源十分有限;而纵贯全境的右江,由于河床深切,水低田高,河谷两岸大量耕地无水灌溉,严重影响区域内农业生产的发展和人民生活水平的提高。2005年,右江上游距离百色市22 km的大型多年调节水库——百色水库建成蓄水,为右江河谷提供了.优越的自流引水灌溉水源条件。文章主要对百色水库自流引水灌溉右江河谷耕地方案进行初步研究。
Youjiang County, Tian Yang County, Tiandong County and Pingguo County, four counties (districts) are located in the Youjiang River valley mountainous area, which is the famous drought area of Guangxi Dabie Mountain in Guangxi. Affected by the geographical and geological conditions, the steep mountain slopes in the area have thin soil cover and low water capacity for land conservation. There is only a limited surface water resource. Due to the deep riverbed, high water and low fields, A large amount of arable land is irrigated by water, seriously affecting the development of agricultural production and the improvement of people’s living standards in the region. In 2005, the upper reaches of the Youjiang River, a large-scale multi-year regulation reservoir of 22 km from Baise City, was built and filled with water for the Youjiang River valley. The paper mainly studies on the plan of arable land for irrigating the Youjiang River valley by gravity flow of Baise reservoir.