The soil moisture storage capacity affected by precipitation assumes an annual fluctuation and this fluctuation presents an obvious hysteretic nature.

土壤储水量受降水的影响呈现年际波动，同时土壤储水量波动具有明显滞后性。

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It is pointed out that the worsening of soil moisture states inthe level terraced fields cover two parts, i. e. the decrease in soil moisture storage rate, and increase in crop water requirement;

指出，水平梯田水分状况的恶化包括蓄墒率的减小和作物需水量的增大两部分；

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The single parabolic curve describing the distribution of soil moisture storage capacity is substituted by double parabolic curve to promote the widely used Xinanjiang model for runoff calculation.

提出了双抛物线型土壤蓄水容量关系曲线，对新安江模型产流计算公式进行了改进。

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