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一、前言旱地灌溉的灌溉效率是全灌溉系统规划、设计的目标值,可以分为从水源到田间的输水效率和送往田间的灌溉水利用率。输水效率主要取决于输水线路的型式。通常,日本的旱地输水设施多为管路系统,其输水效率几乎为既定的值.灌水不帅率是田问灌溉系统规划、设宝卜的目标位,如果提高灌水利用率,可望得到更高的灌水效率. 为了评价送到田问的灌水利用效率,提了水的有效利用率、贮水率和缺水擎等概
I. INTRODUCTION The irrigation efficiency of dryland irrigation is the target value of total irrigation system planning and design. It can be divided into the efficiency of water transfer from water source to the field and the irrigation water utilization rate sent to the field. Water delivery efficiency depends mainly on the type of water line. In general, most of the dryland water delivery facilities in Japan are pipeline systems, and the water delivery efficiency is almost at a given level. The rate of irrigating water is the goal of the irrigation system planning and the goal of improving irrigation efficiency is expected Get higher irrigation efficiency.In order to evaluate the efficiency of irrigation and water delivery to the field, raised the effective utilization of water, water storage and water shortage engine