罗定江流域水环境容量分析

水环境容量是一种有限的可再生自然资源，是经济与社会发展的基础。罗定江是西江的一条支流，水量较小，水环境容量并不丰富。通过对罗定江流域水文特征、污染物特征、水环境现状调查，同时结合水环境容量计算方法，选用一维水质数学模型对罗定江流域水环境容量进行计算分析。结果表明，上游地区水环境容量较小，部分河段出现氨氮超标，水环境容量利用困难；下游地区水环境容量较丰富，可以充分利用发展地区经济。

ANALYSIS THE WATER ENVIRONMENTAL CAPACITY OF THE LUODING VALLEY

Water environmental capacity is a limit and renewable natural resource. It is the foundation of economical and social development. Luoding River is a branch of the Xijang River. The water quantity is small, and the water environmental capacity is not rich. The hydrological characteristics, the contamination characteristics and the water environment status were investigated. Combined with the design procedure of the water environment capacity, one-dimensional water quality model was selected to calculate and analyze the water environmental capacity of Luoding River. The results showed that the water environmental capacity of the upstream is less than that of the downstream, and the contents of ammonia-nitrogen exceeds the criterion in some reaches of the upstream, and the water environmental capacity is hard to utilize. However, the water environmental capacity of the downstream can be utilized to develop the economical of the area.