Identifying Watershed Regions Sensitive to Soil Erosion and Contributing to Lake Eutrophication—A Case Study in the Taihu Lake Basin (China)
Abstract
:1. Introduction
2. Material and Methods
2.1. Study Site
2.2. Spatial-Temporal Representation of Soil Erosion
Land Use | Planted Forest/Grass Land | Original Forest | Water/Building Land | Bare Land | Arable Land (Assigned according to Slope) * | ||||
---|---|---|---|---|---|---|---|---|---|
1.1–2.0 | 2.0–7.0 | 7.0–12.0 | 12.0–18.0 | 18.0–24.0 | |||||
P | 0.3 | 0.2 | 0 | 1 | 0.6 | 0.5 | 0.6 | 0.8 | 0.9 |
2.3. The Spatial-Temporal Representation of the Algae Area
2.4. Relationship between Soil Erosion and Algae Area
3. Results
3.1. The Spatial-Temporal Tendency of Soil Erosion
3.2. Spatial-Temporal Tendency of Algae Area
3.3. Relationship between Soil Erosion and Algae Areas
Correlation Coefficient (r) | r2 | RMSE | ||
---|---|---|---|---|
ML | 1 km | −0.190 | 0.04 | 9.19 |
5 km | 0.77 ** | 0.59 | 0.52 | |
10 km | 0.88 ** | 0.77 | 0.184 | |
20 km | 0.50 * | 0.25 | 0.795 | |
30 km | 0.41 * | 0.17 | 8.29 | |
40 km | 0.18 | 0.03 | 9.68 | |
ZS | 1 km | 0.63 ** | 0.40 | 6.94 |
5 km | 0.75 ** | 0.56 | 1.02 | |
10 km | 0.83 ** | 0.69 | 0.48 | |
20 km | 0.53 * | 0.28 | 3.40 | |
30 km | 0.57 * | 0.32 | 5.67 | |
40 km | 0.49 * | 0.24 | 7.55 | |
WC | 1 km | 0.72 ** | 0.52 | 6.40 |
5 km | 0.69 ** | 0.48 | 8.99 | |
10 km | 0.48 * | 0.23 | 4.80 | |
20 km | 0.29 | 0.08 | 7.73 | |
30 km | −0.10 | 0.01 | 9.03 | |
40 km | −0.12 | 0.01 | 12.32 |
4. Discussion
4.1. Sensitive Watershed Regions within Lake Divisions
4.2. Soil Erosion as an Indicative Target for Watershed Protection Regionalization
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Lin, C.; Ma, R.; He, B. Identifying Watershed Regions Sensitive to Soil Erosion and Contributing to Lake Eutrophication—A Case Study in the Taihu Lake Basin (China). Int. J. Environ. Res. Public Health 2016, 13, 77. https://doi.org/10.3390/ijerph13010077
Lin C, Ma R, He B. Identifying Watershed Regions Sensitive to Soil Erosion and Contributing to Lake Eutrophication—A Case Study in the Taihu Lake Basin (China). International Journal of Environmental Research and Public Health. 2016; 13(1):77. https://doi.org/10.3390/ijerph13010077
Chicago/Turabian StyleLin, Chen, Ronghua Ma, and Bin He. 2016. "Identifying Watershed Regions Sensitive to Soil Erosion and Contributing to Lake Eutrophication—A Case Study in the Taihu Lake Basin (China)" International Journal of Environmental Research and Public Health 13, no. 1: 77. https://doi.org/10.3390/ijerph13010077