Quantification of Spatiotemporal Variability of Evapotranspiration (ET) and the Contribution of Influencing Factors for Different Land Cover Types in the Yunnan Province
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Data Sources
2.2.1. ET Data
2.2.2. Influencing Factors for Analysis Data
2.2.3. Land Cover Data
2.3. Methods
2.3.1. Trend Analysis
2.3.2. Significance Test
2.3.3. Correlation Analysis
2.3.4. Ridge Regression
3. Results
3.1. Temporal and Spatial Change of ET in Yunnan Province
3.1.1. Interannual Change Feature
3.1.2. Monthly Change Characteristics
3.2. Correlation Analysis of ET Impact Factors
3.2.1. Influence of Climate and Vegetation Factors on ET
3.2.2. Correlation with Topography Factors
3.3. The Relative Contribution Rate of Influencing Factors to ET
3.3.1. Histogram of Ridge Regression Coefficients and Contributions of Each Factor on Different Grassland Types
3.3.2. Histograms of Ridge Regression Coefficients and Contributions of Each Factor on Different Land Cover Classifications
4. Discussion
4.1. Impact of Climate and Vegetation Greening on Ecohydrological Processes
4.2. Analysis of ET Differences under Different Land Cover Types
4.3. Uncertainties and Future Improvements
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Factors | R2 | TEMP | PRCP | WDSP | RH | NDVI | SLME | Elevation | Slope | |
---|---|---|---|---|---|---|---|---|---|---|
Landcover | ||||||||||
Grasslands | 0.62 | 0.113 | −0.221 * | −0.211 * | −0.056 | 0.196 | −0.065 | −0.183 | −0.03 | |
Savannas | 0.49 | 0.274 * | 0.139 | −0.145 | −0.199 | 0.403 | −0.105 | −0.127 | −0.056 | |
Woody savannas | 0.77 | 0.119 | −0.283 * | 0.025 | −0.043 | 0.366 * | −0.451 * | −0.007 | 0.209 |
Factors | R2 | TEMP | PRCP | WDSP | RH | NDVI | SLME | Elevation | Slope | |
---|---|---|---|---|---|---|---|---|---|---|
Landcover | ||||||||||
grassland | 0.61 | 0.18 * | 0.203 * | 0.055 | 0.079 | 0.261 * | −0.015 | 0.119 | 0.134 | |
shrub | 0.48 | 0.028 | −0.047 | −0.096 | −0.237 * | 0.054 | −0.011 | −0.259 * | 0.104 | |
barren | 0.38 | −0.022 | −0.03 | 0.102 | −0.124 | 0.362 * | 0.214 * | −0.218 * | −0.188 | |
cropland | 0.77 | −0.124 * | 0.138 * | 0.061 | −0.17 * | 0.033 | −0.391 * | 0.179 * | 0.014 | |
forest | 0.74 | 0.18 * | −0.24 * | −0.052 | −0.028 | 0.283 * | −0.01 | −0.217 * | −0.081 | |
wetland | 0.41 | 0.008 | 0.082 | 0.183 | 0.178 | 0.307 * | −0.141 | 0.218 * | −0.058 |
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Su, W.; Shao, H.; Xian, W.; Xie, Z.; Zhang, C.; Yang, H. Quantification of Spatiotemporal Variability of Evapotranspiration (ET) and the Contribution of Influencing Factors for Different Land Cover Types in the Yunnan Province. Water 2023, 15, 3309. https://doi.org/10.3390/w15183309
Su W, Shao H, Xian W, Xie Z, Zhang C, Yang H. Quantification of Spatiotemporal Variability of Evapotranspiration (ET) and the Contribution of Influencing Factors for Different Land Cover Types in the Yunnan Province. Water. 2023; 15(18):3309. https://doi.org/10.3390/w15183309
Chicago/Turabian StyleSu, Wei, Huaiyong Shao, Wei Xian, Zhanglin Xie, Cunbo Zhang, and Huilin Yang. 2023. "Quantification of Spatiotemporal Variability of Evapotranspiration (ET) and the Contribution of Influencing Factors for Different Land Cover Types in the Yunnan Province" Water 15, no. 18: 3309. https://doi.org/10.3390/w15183309
APA StyleSu, W., Shao, H., Xian, W., Xie, Z., Zhang, C., & Yang, H. (2023). Quantification of Spatiotemporal Variability of Evapotranspiration (ET) and the Contribution of Influencing Factors for Different Land Cover Types in the Yunnan Province. Water, 15(18), 3309. https://doi.org/10.3390/w15183309