<br>木哈子湖土地利用和覆盖对水质时空变化的影响,Scientific Reports

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木哈子湖土地利用和覆盖对水质时空变化的影响
Scientific Reports ( IF 3.8 ) Pub Date : 2021-08-30 , DOI: 10.1038/s41598-021-96633-9
Edovia Dufatanye Umwali _{1,

2,

3,

4,

5} , Alishir Kurban _{1,

3,

5} , Alain Isabwe ₆ , Richard Mind'je _{1,

3,

4,

5} , Hossein Azadi _{1,

7,

8} , Zengkun Guo _{1,

2,

3} , Madeleine Udahogora _{1,

3} , Anathalie Nyirarwasa _{1,

3,

5} , Jeanine Umuhoza _{1,

2,

3,

4,

5} , Vincent Nzabarinda _{1,

2,

3} , Aboubakar Gasirabo _{1,

2,

3,

4,

5} , Gulnur Sabirhazi _{1,

3}

Affiliation

了解土地利用/土地覆盖 (LULC) 对水质的影响与可持续水管理相关。本研究旨在评估卢旺达穆哈齐湖水质与土地利用类型相关的时空变化。国家卫生基金会水质指数（NSF-WQI）用于评估人为引起的水质变化。除了主成分分析 (PCA) 之外，还对 12 个聚类采样点进行聚类分析 (CA) 并获得 NSF-WQI。最后，使用偏最小二乘路径模型 (PLS-PM) 来估计 LULC、水质参数和获得的 NSF-WQI 之间的关系。结果显示，雨季穆戈罗雷和布廷巴遗址水质状况较差，旱季穆戈罗雷和布维米扬格遗址水质状况较差。此外，PCA 显示了基于季节性的样本离散度，而 NSF-WQI 的 CA 层次结构则对与 LULC 类型相对应的样本进行了分组。最后，PLS-PM 在雨季返回了 LULC 与水质参数之间的强正相关系数（+ 0.831），但在旱季返回了负相关系数（− 0.542），农田对水质参数影响很大。总体而言，本研究得出的结论是，该湖泊受到人类活动的季节性影响，建议采取可持续的土地利用管理决策，例如在湖泊附近建立和保护保护区。

"点击查看英文标题和摘要"

Spatio-seasonal variation of water quality influenced by land use and land cover in Lake Muhazi

Understanding the influence of land use/land cover (LULC) on water quality is pertinent to sustainable water management. This study aimed at assessing the spatio-seasonal variation of water quality in relation to land use types in Lake Muhazi, Rwanda. The National Sanitation Foundation Water Quality Index (NSF-WQI) was used to evaluate the anthropogenically-induced water quality changes. In addition to Principal Components Analysis (PCA), a Cluster Analysis (CA) was applied on 12-clustered sampling sites and the obtained NSF-WQI. Lastly, the Partial Least Squares Path Modelling (PLS-PM) was used to estimate the nexus between LULC, water quality parameters, and the obtained NSF-WQI. The results revealed a poor water quality status at the Mugorore and Butimba sites in the rainy season, then at Mugorore and Bwimiyange sites in the dry season. Furthermore, PCA displayed a sample dispersion based on seasonality while NSF-WQI’s CA hierarchy grouped the samples corresponding to LULC types. Finally, the PLS-PM returned a strong positive correlation (+ 0.831) between LULCs and water quality parameters in the rainy season but a negative correlation coefficient (− 0.542) in the dry season, with great influences of cropland on the water quality parameters. Overall, this study concludes that the lake is seasonally influenced by anthropogenic activities, suggesting sustainable land-use management decisions, such as the establishment and safeguarding protection belts in the lake vicinity.

更新日期：2021-08-30

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