| 雄安建设初期白洋淀水质时空差异及其对降雨和土地利用的响应 |
| 摘要点击 2916 全文点击 841 投稿时间：2022-06-13 修订日期：2022-09-23 |
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| 中文关键词 白洋淀 水质评价 时空变化 降雨 土地利用 |
| 英文关键词 Baiyangdian Lake water quality evaluation spatial-temporal variation precipitation land use |
| 作者 | 单位 | E-mail | | 王子铭 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101
中国科学院大学中丹学院, 北京 101400
雄安创新研究院, 雄安 071700 | wangzimia@163.com | | 杨丽虎 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101
中国科学院大学中丹学院, 北京 101400
雄安创新研究院, 雄安 071700 | yanglihu@igsnrr.ac.cn | | 宋献方 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101
中国科学院大学中丹学院, 北京 101400
雄安创新研究院, 雄安 071700 | songxf@igsnrr.ac.cn |
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| 中文摘要 |
| 为查清雄安建设初期白洋淀水质状况，基于白洋淀2020年12月至2021年11月的6个代表性监测点的水质数据，采用土地利用类型遥感解译、Pearson相关分析、综合污染指数和主成分分析等方法，对白洋淀水质的时空分布特征及其对降雨和不同空间尺度下土地利用结构的响应关系进行了研究.结果表明：①白洋淀水质在春季最好，夏季最差.入淀区南刘庄处营养物质污染最重，受府河影响较大；生活区采蒲台处有机物污染最重.②五点综合污染指数呈现：南刘庄>烧车淀>光淀张庄>采蒲台>圈头，主要超标污染物为TN，污染指数1.55已达到重度污染水平.白洋淀水质较雄安新区建设前明显好转.③1.5 km缓冲区内建设用地和耕地对浊度、NH4+-N和TP影响最大.芦苇湿地作为截流吸收污染物的"汇"的同时，在800 m缓冲区内也是污染物的"源"，释放氮营养盐.④雨季各指标与土地利用的相关性低于非雨季，是由于雨季上游水库泄水的稀释作用，减弱了降雨径流中污染物对白洋淀水质的影响. |
| 英文摘要 |
| To assess the water quality of Baiyangdian Lake in the early stage of construction of the Xiong'an New Area, the water quality data in Baiyangdian Lake from December 2020 to November 2021 were collected from five typical monitoring stations. Using the remote-sensing interpretation of land use types, Pearson correlation analysis, comprehensive pollution index, and principal component analysis, the spatial-temporal variation characteristics of the water quality and its response to precipitation and land use structure at different spatial scales were explored in Baiyangdian Lake. The results showed that:① the water quality of Baiyangdian Lake was the best in spring and the worst in summer. Nutrient pollution was the heaviest at Nanliuzhuang, which was greatly affected by the Fuhe River. Organic pollution was the heaviest at Caiputai. ② The comprehensive pollution index of Nanliuzhuang was the highest, followed by that of Shaochedian, Guangdianzhangzhuang, Caiputai, and Quantou. The main excessive pollutant was TN, and the pollution index of 1.55 reached the level of severe pollution. The water quality of Baiyangdian Lake was significantly better than that before the construction of the Xiong'an New Area. ③ The construction land and cropland within the 1.5 km buffer zone had the greatest impact on turbidity, NH4+-N, and TP. While the reed wetland acted as the "sink" for intercepting and absorbing pollutants, it also released nitrogen into the 800 m buffer zone, which was the "source" of the pollutants. ④ The correlation between water quality indicators and land use structure in the rainy season was lower than that in the dry season. This was due to the dilution effect of the upstream reservoir discharging in the rainy season, which weakened the impact of pollutants in the rainfall runoff on the water quality of Baiyangdian Lake. |
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