河道治理工程重在改善河道的水质，以恢复河流生态系统。本文以北京市大兴区天堂河河道治理工程为例，介绍了河道治理工程环境影响评价中的水质改善预测分析，首先分析生态需水量和供氧量是否满足河流生态需水要求，后又利用地面水环评助手软件预测了河流水质，预测分析了天堂河水质目标的可达性，旨在为以后的河道治理类工程环境影响评价提供参考。%A river regulation project is to improve the quality of river water, so as to recover the river ecosystem. As a case study, based on the regulation project of Tiantang River in Daxing District of Beijing, in this paper the prediction of water quality improvement of river regulation project in environmental impact assessment was introduced. Firstly whether the ecological water demand and oxygen supply met the river ecological water demand were analyzed; and then the quality of surface water was predicted using the software of environmental assessment assistant; finally the accessibility of the water quality goal of Tiantang River was analyzed, so as to provide references for the environmental impact assessment on river regulation projects in future.
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