Samenvatting
The wind prevention and sand fixation function are the main ecological service function of sand-prevention belt in northern China, which is important for the construction of ecological safety harrier in northern China. In this study, the sand-prevention belt in Inner Mongolia was selected as the study region, the revised wind erosion equation (RWEQ) was applied to quantify soil wind erosion mass and wind prevention and sand fixation mass in 2000 and 2015. We ana-lyzed the spatial and temporal variations of wind prevention and sand fixation function, and the effects of land-use change on wind prevention and sand fixation function, aiming to provide refer¬ence for improving ecological service function of sand-prevention belt in northern China. The re- 1 1 \ " ∗ ∗ II∗ ^ , m suits showed that; ( 1) soil wind erosion mass ranged from 0.007 to 48.9 kg • m ' in 2000, with • •• 8 i i ∗ i ∗ o a total soil wind erosion mass of 29418.3x10 kg, while it ranged from 0.002 to 48.2 kg • m " in 2015, with a total soil wind erosion mass of 28727.3 x10s kg. From 2000 to 2015, the total • II • 111 S r • • • 1 amount of wind erosion in the whole region reduced by 691.1x10 kg. The intensity of soil wind erosion was mainly moderate, intensive, and severe, which together accounted for 71.6% of the total area in 2000, while it was mainly slight, moderate, and severe, accounting for 78.7% of the total area in 2015. The area of the regions with soil wind erosion of intensive, extreme, and severe intensity decreased by 101079 km2, while the area with soil wind erosion of mild and mod¬erate intensity increased by 100572 km2. (2) The average amount of wind prevention and sand fixation per unit area ranged from 0 to 42.4 kg • m " in 2000, while it ranged between 0 and 45.4 kg • in 2 in 2015. The average amount of wind prevention and sand fixation per unit area was the highest in Chifeng City, followed by Tongliao and Ordos cities, while Wuhai and Shizuishan cit¬ies had the lowest values. The total amount of wind prevention and sand fixation in the study region was increased by 646.0x10s kg from 2000 to 2015. The level of wind prevention and sand fixation functions was mainly low, relatively low, and medium, together accounting for more than 75% of the total area. The area with wind prevention and sand fixation functions of relatively high and high levels increased by 1979 km2. (3) From 2000 to 2015, the total area of desert decreased and was mainly converted into grassland and cultivated land. The converted grassland /y /y area was 6460.7 km", while the converted cultivated land area was 439.2 km'. Our results indi¬cated that the capability of wind prevention and sand fixation function in the sand-prevention belt in Inner Mongolia significantly was improved over the past 15 years due to revegetation, but var¬ied greatly among different parts of the study region. Therefore, we should take different strategies in different sand-fixing function zones, and pay more attention to the improvement of sand-fixing function in the western part.
Vertaalde titel van de bijdrage | Spatiotemporal variations of wind prevention and sand fixation function in the sand-pre- vention belt in Inner Mongolia in recent 15 years. |
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Originele taal-2 | Chinees (traditionele) |
Pagina's (van-tot) | 3436-3447 |
Aantal pagina's | 12 |
Tijdschrift | Journal of Ecology |
Volume | 40 |
Nummer van het tijdschrift | 11 |
DOI's | |
Status | Published - 10 nov 2021 |
Extern gepubliceerd | Ja |
Bibliografische nota
Publisher Copyright:© 2021 editorial Board of Chinese Journal of Ecology. All rights reserved.
Keywords
- forestry eco¬logical engineering
- land use/cover type
- revised wind erosion equation
- soil wind erosion