开发利用灌溉回归水，是灌溉水重复利用的重要方式，像工业用水的重复利用一样，灌溉水的重复利用也是节约用水的一条重要途径。灌溉回归水是灌溉过程中难以完全避免的深层渗漏水，又回归到水资源循环系统中去的那部分水量。搞清楚这部分水量的来龙去脉及其质和量，对于提高水 The development and utilization of irrigation return water is an important way to reuse irrigation water. Like the reuse of industrial water, the reuse of irrigation water is also an important way to save water. Irrigated return water is the amount of deep seepage water that is difficult to completely avoid during irrigation and returns to the part of the water circulatory system. Find out the ins and outs of this part of the amount of water and its quality and quantity, for raising water