双河—磨南德水源林自然保护区地貌特征

doi:10.16843/j.sswc.2021.04.004

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Abstract [Background] Shuanghe-Monande Water Source Nature Reserve (following abbreviated as the Nature Reserve) is the most important urban concentrated drinking and emergency water source in Anning city. There are a large number of scattering villages and arable land. Historically, intense human activities have caused severe soil erosion. Therefore, it is necessary to deeply analyze the geomorphic causes of this process in order to provide scientific and geomorphological basis in the prevention and control of soil erosion, optimization of land use structure, and planning of the ecological environment in this area, and also to provide methodological references for the study of geomorphological characteristics in other similar protected areas and water sources in central Yunnan.[Methods] Based on the Advanced Land Observing Satellite (ALOS) DEM data on the ArcGIS platform, the Natural Reserve's altitude, relief, slope, aspect, topographic profile and other geomorphic parameters were analyzed; meanwhile, the Natural Reserve was divided into 32 sub basins, and the hypsometric integral (HI) and hypsometric curve (HC) of each sub basin were calculated.[Results] 1) The altitude of the Natural Reserve is 1 930-2 522 m, the average is (2 105±113) m, the topographic relief is 0-622 m, the average is (212±113) m, mainly small undulating mountains (50.22%) and hills (46.88%), the basic landform types are small undulations subalpine (50.21%) is the predominant, followed by sub-high-elevation hills (25.85%) and medium-elevation hills (21.03%). 2) The slope is 0° -61.5°, with an average of (15.4±8.6)°, with gentle slopes (38.87%) as the main, followed by slopes (32.73%) and steep gentle slopes (15.76%), and all types of slopes accounted for 23%-26%. 3) Three-level denuded surfaces are developed in the Natural Reserve, with altitudes of 2 520, 2 350, and 2 200 m respectively. There are more than 30 intermountain basins formed between the mountains and hills, accounting for 16.5% of the total area, with various genetic types. 4) The HI is between 0.220-0.538, with an average of 0.374, and the geomorphological evolution is mainly in the late stage of prime.[Conclusions] The unique spatial pattern of landforms and rich habitat types are not only an important support for biodiversity in the Natural Reserve, but also the basis for the formation of the spatial configuration of land use types. Mountain hills and basins in the Natural Reserve are alternately distributed, with small undulating sub-alpine, mid-elevation, sub-high-elevation hills and gentle slopes as the main geomorphological structure. It is a root cause of the Natural Reserve with many villages and cultivated land, human activities are strong, and the conservation function is generally weak.

Key words： basic landform type slope aspect hypsometric integral topography profile Shuanghe Monande Water Source Forest Nature Reserve

Received: 16 January 2019

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	DING Zhiqiang
	WANG Ping
	LI Yuhui
	PANG Yunhai

Cite this article:

DING Zhiqiang,WANG Ping,LI Yuhui, et al. Geomorphological characteristics of Shuanghe-Monande Water Source Forest Nature Reserve[J]. SSWC, 2021, 19(4): 34-43.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2021.04.004 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2021/V19/I4/34

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