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Contributions of Vegetation Greening and Climate Change to Evapotranspiration Trend after Large-Scale Vegetation Restoration on the Loess Plateau, China
| Content Provider | MDPI |
|---|---|
| Author | Wang, Shuo Cui, Chenfeng Dai, Qin |
| Copyright Year | 2021 |
| Description | Since the early 2000s, the vegetation cover of the Loess Plateau (LP) has increased significantly, which has been fully recorded. However, the effects on relevant eco-hydrological processes are still unclear. Here, we made an investigation on the changes of actual evapotranspiration $(ET_{a}$) during 2000–2018 and connected them with vegetation greening and climate change in the LP, based on the remote sensing data with correlation and attribution analysis. Results identified that the average annual $ET_{a}$ on the LP exhibited an obvious increasing trend with the value of 9.11 mm $yr^{−1}$, and the annual $ET_{a}$ trend was dominated by the changes of $ET_{a}$ in the third quarter (July, August, and September). The future trend of $ET_{a}$ was predicted by the Hurst exponent. Partial correlation analysis indicated that annual $ET_{a}$ variations in 87.8% regions of the LP were controlled by vegetation greening. Multiple regression analysis suggested that the relative contributions of potential evapotranspiration $(ET_{p}$), precipitation, and normalized difference vegetation index (NDVI), to the trend of $ET_{a}$ were 5.7%, −26.3%, and 61.4%, separately. Vegetation greening has a close relationship with the Grain for Green (GFG) project and acts as an essential driver for the long-term development trend of water consumption on the LP. In this research, the potential conflicts of water demanding between the natural ecosystem and social-economic system in the LP were highlighted, which were caused by the fast vegetation expansion. |
| Starting Page | 1755 |
| e-ISSN | 20734441 |
| DOI | 10.3390/w13131755 |
| Journal | Water |
| Issue Number | 13 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-06-25 |
| Access Restriction | Open |
| Subject Keyword | Water Remote Sensing Evapotranspiration Ndvi Climate Change Partial Correlation Analysis Contribution Loess Plateau |
| Content Type | Text |
| Resource Type | Article |
