[1]BAI Ziyi,XUE Liang,ZHANG Chong.Evaluation on Suitability of Ecological Restoration Project in the Loess Plateau Based on Soil Moisture and Vegetation Cover Change[J].Research of Soil and Water Conservation,2019,26(04):292-298.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 04
Page number:
292-298
Column:
Public date:
2019-06-11
- Title:
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Evaluation on Suitability of Ecological Restoration Project in the Loess Plateau Based on Soil Moisture and Vegetation Cover Change
- Author(s):
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BAI Ziyi1, XUE Liang1, ZHANG Chong2
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1. School of Geography and Tourism, Shaanxi Normal University, Xi’an 710119, China;
2. Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Modeling, Baoji University of Arts and Sciences, Baoji, Shaanxi 721000, China
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- Keywords:
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soil moisture; vegetation cover; ecological restoration; suitability; the Loess Plateau
- CLC:
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S152.7+1;Q948;TP79
- DOI:
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- Abstract:
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Based on the MODIS data and Landsat data from 2001 to 2014, we have estimated the soil moisture in the Loess Plateau using temperature vegetation dryness index. The Theil-Sen method and Hurst index were used to analyze the spatiotemporal variation of soil moisture and vegetation cover as well as their interrelationship and get the different vegetation changes under different situations of soil moisture in the future. The suitability region of ecological restoration project was divided through filter and analysis in the Loess Plateau. The results showed that: (1) the average Hurst index of TVDI in the Loess Plateau was 0.49, of which the persistent and anti-persistent areas accounted for 42.54% and 57.46%, respectively; according to the characteristics of future changes of TVDI, the area of soil moisture will decrease in the future, accounting for 54.08% and distributing in the whole study area; (2) the average Hurst value of NDVI was 0.52, of which 55.01% was the sustained area, indicating that vegetation cover persistence in the Loess Plateau was stronger than that in reverse; according to the future variation characteristics of NDVI, area of vegetation cover continuing to improve accounted for 46.95%, and the area of conversion of degradation into improvement accounted for 6.08%, showing the good trend; (3) the ecological restoration project had carried out in the largest area with weak suitability, accounting for 59.9% of the total area, followed by unsuitable zones, accounting for 25.39% of the total area; the suitable area covered only 13.41% of the Loess Plateau, and the area of better suitable area was only 1.3% of the Loess Plateau; (4) the future vegetation restoration project should mainly focus on the larger sloping arable land to implement the conversion of sloping farmland into forestland, but also consider the soil water suitable areas where the grassland should be converted into the forestland, and the farmland should be converted into forestland, and the grassland should be converted into forestland in the more suitable areas with gentle slope on the basis of food security.