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宁夏老灌区位居黄河中游冲积平原的背脊部分,为古老灌溉绿洲。农业历史悠久,距今二千余年以前即已开渠造田,种植作物,是宁夏回族自治区重要的粮食、经济作物的生产基地。老灌区地形坦荡狭长,东西宽约5—40公里,南北长约250公里,面积有6,000多平方公里,约占宁夏引黄灌区土地总面积的75％。地势由西南向东北逐渐倾斜宽敞,地面坡降一般为1/1200—1/6500,愈往北,愈为平缓。但是由于人为长期灌溉淤积作用的结果,沿老干渠(如河东秦渠、汉渠、河西唐徕渠、汗延渠、卫宁地区美利渠、羚羊渠等)两侧
Ningxia old irrigation area is located in the middle reaches of the Yellow River alluvial plain ridge part of the ancient irrigation oasis. With a long history of agriculture, more than 2,000 years ago, it had opened up fields and planted crops. It is an important grain and cash crop production base in Ningxia Hui Autonomous Region. The old irrigated area has a long and narrow topography with a width of 5-40 km and a length of 250 km from north to south. It covers an area of over 6,000 square kilometers and accounts for about 75% of the total land area in the Yellow River irrigated area of Ningxia. The terrain gradually from southwest to northeast tilt spacious ground slope is generally 1 / 1200-1 / 6500, the more north, the more gentle. However, as a result of man-made long-term irrigation and siltation, along both sides of Laogan Channel (such as Qindong in Hedong, Hankou, Tangxi Channel in Hexi, Khanxian Channel, Murray Canal in Weining, Antelope Channel, etc.)