广西茅岭江入海典型污染物通量估算方法

Method of Estimating the Typical Pollutant Flux from Maoling River to Maowei Sea in Guangxi

茅岭江是入注茅尾海的重要河流,其携带的污染物是茅尾海污染物的主要来源之一。由于各种因素,流域的总径流量和污染通量估算存在一定困难。为掌握茅岭江污染物入海情况,本研究结合茅岭江入海口附近的两条污染物浓度监测断面的监测数据,针对观测时间相对较长的CODCr浓度开展年入海通量估算方法研究。研究利用修正的流域径流数据结合断面监测浓度,提出缺乏流量观测资料子流域的径流估算方法,并比较分析3种不同概化方法估算年污染物通量。结果表明,采用年平均修正流量与年平均河口断面监测浓度可以简单估算茅岭江的污染物入海年通量。该方法也可以直接应用于其他污染指标的年通量计算。

Maoling River is an important river into the Maowei Sea, the pollutants which carries are one of the main sources of pollutants in Maowei Sea. Due to various factors, there are certain difficulties in estimating the total runoff and pollution flux of the basin. In order to grasp the situation of Maoling River pollutants entering the sea, this paper studied the annual seawater flux estimation method for the COD Cr concentration with relatively long observation time based on the monitoring data of two pollutant concentration monitoring sections near the estuary of the Maoling River. The study used the modified watershed runoff data combined with the section monitoring concentration, proposed a runoff estimation method of the sub basin that lacked flow observation data, and compared and analyzed three different generalization methods to estimate the annual pollutant flux. The results show that the annual average corrected flow rate and the annual average estuary section monitoring concentration can be used to estimate the annual flux of pollutants into the sea. The method can also be directly applied to the annual flux calculation of other pollution indicators.