宁夏南部山区同心、海原等地,属我国西北黄土高原一部分。该区干旱严重,七十年代末建成同心扬水工程,对解决当地人畜饮水和农业灌溉发挥了很大作用,效益显著。但由于部分渠线处于黄土湿陷区内,建成通水后发生了不同程度的自重湿陷。为了进一步总结经验 Ningxia mountainous concentric, Haiyuan and other places, is a part of Northwest Loess Plateau. Drought is serious in this area and the concentric pumped-up project was completed in the late seventies. It has played a significant role in solving the problem of drinking water for local people and livestock and irrigation in agriculture. However, due to some of the drainage lines in the loess collapsible area, after completion of the water flow, different degrees of self-weight collapse occurred. In order to further sum up experience