气象条件对湖北长湖水质的影响研究
Influence of Meteorological Factors on Temporal and Spatial Variation of Water Quality in Changhu Lake,Hubei Province
中文摘要：
长湖2014—2017年的水质监测和气象数据综合分析表明，长湖水质的主要问题是富营养化，主要污染指标为总磷（TP）、总氮（TN）、化学需氧量（COD）和五日生化需氧量（BOD5）。这些指标的变化呈现出明显的时空异质性。在空间上长湖入水口与出水口的TP、TN、COD差异明显，但BOD5无明显差异。时间维上，2014—2017年水质总体上有所好转，但各指标显示出不同程度的季节性变化，水质变化受气象因素影响明显。其中，TP与降雨变化呈明显的正相关，而TN与气温存在一定的负相关。
中文关键词：
长湖，富营养化，气象，时空变化
KeyWords：
Changhu Lake, eutrophication, weather, temporal and spatial variation
Abstract：
The comprehensive analysis of water quality and meteorological data in Changhu Lake for 2014-2017 demonstrates that the main problem of water quality in Changhu Lake is the eutrophication. The main pollution indicators are total phosphorus (TP), total nitrogen (TN), and chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) on five days. Variations in these indicators show significant spatial and temporal heterogeneity. In the space, the differences of TP, TN and COD between inlet and outlet in Changhu Lake was obvious, but there was no significant difference in BOD5. In terms of time scale, the overall water quality was improved during the period from 2014 to 2017, but the indicators showed that seasonal variations appeared at different levels, and the water quality was significantly affected by meteorological factors. The TP was positively correlated to the rainfall, while TN was negatively correlated with the temperature.