宁夏扶贫扬黄灌溉工程红寺堡灌区盐渍化发展趋势预测

红寺堡灌区是宁夏为使宁南山区人民脱贫致富而建立的移民圩发区。在工程规划过程中,由于未进行水文地质、环境地质调查工作,盲目采取扬黄灌溉方式.使部分灌区产生了较为严重的土壤次生盐渍化。通过对灌区地质、水文地质条件及土壤次生盐渍化形成的背景条件的综合分析,对其发展变化趋势进行了预测。预测结果红寺堡灌区最适宜的农业开发扬黄灌溉区面积有117.94km2;适宜的农业开发扬黄灌溉区面积有322.36 km2;较适宜的农业开发扬黄灌溉区面积有21.82 km2;需谨慎的农业开发扬黄灌溉区面积有106.44 km2。

Prediction of the Evolving Trend of Salification in the Irrigation-developed Area of Hongsipu, Ningxia

The irrigation developed area of Hongsipu is a development area for immigration, which is built up by the Ningxia Hui Autonomous Region for the people in the mountains of South Ningxia to castoff poverty and set out on a road to prosperity. For the reason that hydrogeology and environmental geology investigation haven't been carried out during planning, and the water of Yellow River was imported for irrigation blind ly, serious salification was arosed in part of the irrigation area. Synthesize analysis of the geology hydrogeology condition and the cause of soil sal ification was carried out, to predict the developing trends of salification. The prediction results show that, in the irrigation-developed area of Hongsipu, the best farming area suit for irrigation by the water from Yellow River counts for f 17. 94 km2, suitable area for Yellow River water irrigation is 322. 36 km2, the less suitable area is 21. 82 km2, and the inaptitude area for irrigation counts for 106. 44 km2.