论文部分内容阅读
黄河后套灌区,西起乌兰布和沙漠之边缘,东抵乌拉山之西端,南临黄河,北界阴山。总土地面积达1784.6万亩,呈扇面形展布,为我国著名的大型灌区之一。据不完全统计,自五十年代初至现在,河套灌区水利投资约2.8亿元,灌区群众投入的劳力累计达1.2亿个,完成土石方工程量约6亿立方米。然而,长期以来,在灌区水利工程建设上,重灌轻排,恶化了耕地的土壤条件。后套灌区在全面发展农、林、牧、
After the Yellow River Irrigation District, west of Ulan Buh and the edge of the desert, east of the Wula Mountain West, south of the Yellow River, north of Yinshan. The total land area of 17.846 million hectares, was fan-shaped surface distribution, as one of China’s famous large-scale irrigation. According to incomplete statistics, since the early 1950s up to now, the investment in water conservancy of Hetao Irrigation District has reached 280 million yuan. The accumulated labor input by the irrigated areas has reached 120 million and the volume of earth and stone works has been completed to about 600 million cubic meters. However, for a long time, recharging irrigation and drainage in irrigation water conservancy projects has worsened the soil conditions in cultivated land. After the irrigation area in the comprehensive development of agriculture, forestry, animal husbandry,