Based on the principle of soil water balance, including precipitation, temperature and other observations, this article built a model of soil drought index.

从土壤水分平衡原理出发，以降水量、温度和区域水文观测等因子为基础，建立了土壤干旱指数模型。

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We propose that the evaporation driven by increased temperature plays an important role in water balance and influences the hydrologic process of Namu Co.

由此提出蒸发量在湖泊水量平衡中起重要作用，温度是影响湖泊水文变化的关键因子。

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According to the water and heat balance principle, this paper discussed the influence of the Baiyangdian Lake on the air temperature and humidity.

本文首先根据水热平衡原理，讨论了白洋淀对气温和湿度的影响。

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