There are low precipitation and high evaporation in Xinjiang while water surface evaporation main stem from water loss of river runoff.

新疆降水稀少、蒸发强烈，水面蒸发是河川径流水量损失的主要组成部分。

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A simple two-layer analytical model was developed to describe the process of dissolved chemical loss in surface runoff from the beginning of runoff occurrence.

本文根据地表径流中溶质流失的流动特征和物理规律，基于矢量合成概念，建立了二层解析模型，描述从降雨开始径流使水溶质在地表的流失过程。

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Surface effects of the initial solute concentration were the key to solute loss, also an important parameter of the simulated runoff solute loss.

地表初始溶质浓度是影响溶质流失量的关键，也是模拟径流溶质流失的重要参数。

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