Exploring the effect of basin land degradation on lake and reservoir water quality in China
文献类型：期刊论文
| 作者 | Wei, Wei; Gao, Yongnian; Huang, Jiacong; Gao, Junfeng |
| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2020 |
| 卷号 | 268 |
| 英文摘要 | Studying the trends and ecological impacts of basin land degradation is important to protect lake and reservoir water quality and for basin land-use planning. This study examined 12 lakes/reservoirs and their basins in China, and based on basin land-use and lake/reservoir water-quality indicator data (pH, dissolved oxygen (DO), permanganate index (CODMn), ammonia nitrogen (NH3-N), total nitrogen (TN), and total phosphorus (TP)) from 2005, 2010, and 2015, the land degradation trends of the basins and their relationships to lake/reservoir water quality were analyzed using Spearman correlation analysis, redundancy analysis (RDA), and geographic information system (GIS) techniques. The results showed that: (1) The proportion of ecological land (change rate: -0.06%) and cultivated land (change rate: -0.38%) showed a downward trend, and the proportion of degraded land showed a significant upward trend (change rate: +2.90%). The increase in built-up land was the fastest among all land types (change rate: +2.93%). (2) The proportion of degraded land (dominated by built-up land) and cultivated land (dominated by cropland) in the basins was significantly positively correlated with CODMn, NH3-N, TN, and TP but significantly negatively correlated with DO. Conversely, the proportion of ecological land (dominated by forest land) in the basins was significantly negatively correlated with CODMn, NH3-N, TN, and TP but significantly positively correlated with DO. This showed that basin land degradation had a significant adverse impact on lake/reservoir water quality. (3) RDA indicated that basin land degradation explained up to 58.6% of lake/reservoir water-quality changes. Degraded land had the highest RDA explanation rate (31.4%) for lake/reservoir water-quality changes, and within this category, built-up land had the highest explanation rate (built-up land: 27.9%; desertified land: 12.7%). Ecological land explained 29.2% of lake/reservoir water-quality changes, within which forest land had the highest explanation rate (forest land: 24.7%; grassland: 9.4%; wetland: 12.5%). Cultivated land explained 22.7% of lake/reservoir water-quality changes, within which cropland had the highest explanation rate (cropland: 19.7%; garden land: 4.9%). In conclusion, the land in the selected lake/reservoir basins showed a clear trend of degradation, and this degradation trend had a significant adverse impact on the changes in lake/reservoir water quality. The results of this study can support policymakers to contain basin land degradation, to protect lake/reservoir water quality and to improve the sustainability of basin land and water resources. (C) 2020 Elsevier Ltd. All rights reserved. |
| 源URL | [http://159.226.73.51/handle/332005/19953]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Wei, Wei,Gao, Yongnian,Huang, Jiacong,et al. Exploring the effect of basin land degradation on lake and reservoir water quality in China[J]. JOURNAL OF CLEANER PRODUCTION,2020,268. |
| APA | Wei, Wei,Gao, Yongnian,Huang, Jiacong,&Gao, Junfeng.(2020).Exploring the effect of basin land degradation on lake and reservoir water quality in China.JOURNAL OF CLEANER PRODUCTION,268. |
| MLA | Wei, Wei,et al."Exploring the effect of basin land degradation on lake and reservoir water quality in China".JOURNAL OF CLEANER PRODUCTION 268(2020). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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