灌溉回归系数irrigation return flow rate 潜水蒸发量evaporation discharge of phreatic water 潜水极限蒸发深度critical depth of phreatic water evaporation ..
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由于考虑因素更多，故比以往用单一值计算潜水蒸发量的精度更高。
Due to consideration of multiple factors instead of single factor, the precision of calculation of the phreatic evaporation is higher than that of single factor method.
潜水蒸发量是水资源分析评价中推算陆面总蒸发量的重要因素之一，尤其在缺乏资料地区更为重要。
The phreatic water evaporation is an important factor for calculating the sur face total evaporation, especially in those areas that short of data.
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