[1]XU Liting.Natural Factors of Land Use Change in Wujiang River Basin[J].Research of Soil and Water Conservation,2022,29(05):319-326.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 05
Page number:
319-326
Column:
Public date:
2022-08-20
- Title:
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Natural Factors of Land Use Change in Wujiang River Basin
- Author(s):
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XU Liting
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(Shaanxi Normal University, Xi'an, 710000, China)
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- Keywords:
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land use change; Wujiang River Basin; natural factors; boosted regression tree
- CLC:
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F301.24
- DOI:
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- Abstract:
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Natural factors are the main causes of land use change in a typical mountainous watershed. As a typical mountainous basin, the contribution rates of various natural factors in the transformation of land use types in Wujiang River Basin were studied, and the key driving factors were found, so as to provide reference for the rational adjustment of land use layout. Based on the three land use data in 2000, 2010, and 2020, from the spatiotemporal and holistic characteristics, we analyzed the natural factors of land use change in Wujiang River Basin by integrating various natural factors and using the boosted regression tree model. The results showed that:(1)from 2000 to 2020, the land uses types of Wujiang River Basin showed that the proportions of forest land, shrub land, water, and artificial surface area increased significantly, the areas of cultivated land and wetland decreased significantly, and the change of grassland area showed a stable trend;(2)the comparison between 2000 and 2020 showed that the water area in the middle of Wujiang River Basin expanded, the forestland in the north increased, and the cultivated land area in the east decreased significantly; the spatial changes of grassland and shrub land were not obvious, which presented the embedded distribution; the increase of the artificial surface was most obvious in the southeast, southwest, northeast, and northwest;(3)in terms of contribution rate, precipitation contributed the most to grassland change, the slope had the largest impact on cultivated land, vegetation type had the greatest influence on forestland, the slope was the biggest natural driving factor affecting wetland, the temperature was the most natural factor that restricted the development of shrub land, and soil type had the largest contribution rate to water change, slope was the biggest natural driving factor of artificial surface change. To sum up, the main characteristic factors of grassland change were precipitation, vegetation type and temperature; the characteristic factors of cultivated land change were slope, elevation and temperature respectively; the characteristic factors of forest land change were vegetation type, elevation and air temperature; the characteristic factor of wetland change was slope; the characteristic factors of shrub land change were temperature, soil type and vegetation type; the characteristic factors of water body change were soil type and vegetation type; the characteristic factors of man-made surface change were slope and vegetation type.