[1]WANG Lei,ZHAO Xia,ZHANG Chenyue,et al.Assessment of Windbreak and Sand Fixation Function and Identification of Sensitive Landuse Types in Mangai City Based on RWEQ Model[J].Research of Soil and Water Conservation,2023,30(01):144-153.[doi:10.13869/j.cnki.rswc.2023.01.024]
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 01
Page number:
144-153
Column:
Public date:
2023-01-10
- Title:
-
Assessment of Windbreak and Sand Fixation Function and Identification of Sensitive Landuse Types in Mangai City Based on RWEQ Model
- Author(s):
-
WANG Lei1,2, ZHAO Xia1,2, ZHANG Chenyue1,2, TANG Wenjia3
-
(1.Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation, ministry of Education, Qinghai Normal University, Xining 810008, China; 2.Academy of Plateau Science and Sustainability, Xining 810008, China; 3.Ecological Environment Monitoring Center of Qinghai Province, Xining 810007, China)
-
- Keywords:
-
Revised Wind Erosion Equation Model; climate factor; windbreak and sand fixation function; Mangai City
- CLC:
-
P964; X826
- DOI:
-
10.13869/j.cnki.rswc.2023.01.024
- Abstract:
-
For accurately evaluating the windbreak and sand fixation function of Mangai City and identifying the sensitive landuse types to the windbreak sand fixation function, this study determined the climatic factor(WF)in the Revised Wind Erosion Equation Model(RWEQ)through four methods, and calculated the amount of soil wind erosion and windbreak and sand fixation in Mangai City. Then, the windbreak and sand fixation function were evaluated and classified according to three methods such as the guideline method, the natural intermittent method and the literature-actuality combination method. Meanwhile, the sensitive landuse types to function changes through superposition the landuse types and spatial distribution of windbreak and sand fixation function were identified by ArcGIS. The results show that:(1)the spatial distribution and threshold range of WF obtained by using method of wind erosion climatic factors(Fq)directly to replace WF were most consistent with the reality; the RWEQ model can accurately evaluate the windbreak and sand fixation function of Mangai City;(2)in 2014, the average wind erosion modulus of Mangai City was 57.99 kg/(m2·a), belonged to the zone with strong wind erosion; the amount of windbreak and sand fixation per unit area of Manyai City in 2014 ranged from 0 to 44.93 kg/m2, with a weak windbreak and sand fixation function;(3)among three methods of assessment and classification, the literature-actuality combination method reflected the spatial variation of windbreak and sand fixation function in the mountainous area in southwest of Mangai City from 2014 to 2018; and the regional scope with high-level function was wide;(4)Grassland was the most sensitive landuse type to windbreak and sand fixation function changes of Mangai City from 2014 to 2018. The RWEQ model effectively evaluated the windbreak and sand fixation function of Mangai City, and identified sensitive landuse types. This study provides a scientific reference for the application of windbreak and sand fixation function evaluation technology on county scale.