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[1]LONG Yinghao,LI Xudong,CHENG Dongya.Topographic Differentiation of Vegetation Coverage Changes Between Shaded Slopes and Sunny Slopes in Mountainous Areas[J].Research of Soil and Water Conservation,2022,29(05):268-275,282.

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Topographic Differentiation of Vegetation Coverage Changes Between Shaded Slopes and Sunny Slopes in Mountainous Areas

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 268-275,282 Column: Public date: 2022-08-20

Title:: Topographic Differentiation of Vegetation Coverage Changes Between Shaded Slopes and Sunny Slopes in Mountainous Areas

Author(s):: LONG Yinghao, LI Xudong, CHENG Dongya; (School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China)

Keywords:: vegetation; shady slope; sunny slope; terrain; mountainous area; Kaiyang; Guizhou Province

CLC:: K903

DOI:: -

Abstract:: Vegetation coverage is important indicator of ecological restoration. Studying change characteristics of vegetation coverage can provide scientific references for the rational use of resources and restoration of the ecological environment. Kaiyang County in Guizhou Province was chosen as an example. Based on landsat4-5 TM and Landsat8 OLI remote sensing images, the vegetation coverage data of 30 m resolution in 2002 and 2019 were obtained. From the perspectives of shaded and sunny slopes, the vegetation coverage changes and topographic differentiation characteristics were analyzed. The results showed that:(1)the vegetation coverage on the shaded and sunny slopes from 2002 to 2019 was generally high in the south and low in the north; during this period, the vegetation coverage on the shade and sunny slopes was generally recovering;(2)during the study period, the vegetation coverage on the shade and sunny slopes showed an increasing trend with the elevation; vegetation coverage difference between sunny and shady slopes was the largest in areas with an altitude of less than 600 m; in 2019, the vegetation coverage of the sunny and shady slopes decreased significantly in areas with an altitude of less than 600 m, and increased significantly in areas above 800 m;(3)the vegetation coverage of shaded and sunny slopes showed an overall upward trend with the increase of slope gradient, and the difference between the two increased when the slope was greater than 35°; the increase in vegetation coverage showed an upward-declining characteristic with the increase of slope gradient;(4)the vegetation coverage on the shade and sunny slopes showed an increasing trend with the increase of terrain undulations; in 2002, the vegetation coverage of sunny slopes at all levels of terrain undulations was generally higher than that of shaded slopes; in 2019, the difference in vegetation coverage between the two increased with the increase of terrain undulations. In summary, the vegetation coverage of shady and sunny slopes is positively correlated with altitude, slope, and terrain relief, and the two have great differences in different grades of terrain gradients. The influences of terrain factors on the vegetation coverage of shady and sunny slopes in mountainous areas are multi-facets. It not only affects the combination of water and heat conditions from altitude and slope, but also affects the development and utilization of forestland resources in mountainous areas from the slope and terrain relief.

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Last Update: 2022-08-20