|Table of Contents|

Diffusion Path of Sand Source in Hotan Area of Xinjiang, China Based on “Source-sink” Theory and Urban Expansion Ecological Resistance(UEER)Model(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2020年第05期
Page:
701-710
Research Field:
水资源与环境
Publishing date:

Info

Title:
Diffusion Path of Sand Source in Hotan Area of Xinjiang, China Based on “Source-sink” Theory and Urban Expansion Ecological Resistance(UEER)Model
Author(s):
HAN Rui-ying;  ZHAO Zhi-ping*;  XIAO Neng-wen;  SHI Na-na;  ZHANG Feng-chun;  GAO Xiao-qi;  LIU Gao-hui
Chinese Research Academy of Environment Sciences, Beijing 100012, China
Keywords:
sand source;  diffusion path;  diffusion node;  “source-sink” theory;  UEER model;  desertification;  classification;  Xinjiang
PACS:
P951; Q149
DOI:
10.19814/j.jese.2020.04019
Abstract:
Clarifying diffusion path of sand source has practical significance for desertification prevention. Based on “source-sink” theory in landscape ecology, taking Hotan area in Xinjiang as the research area, the sand source area was extracted and the ecological resistance surface of sand source diffusion was constructed through urban expansion ecological resistance(UEER)model. Meanwhile, 128 potential diffusion paths of sand source in Hotan area were extracted, and 71 important diffusion paths of sand source were selected by gravity model. In addition, 48 diffusion nodes of sand source were identified, including 31 class Ⅰ and 17 class Ⅱ diffusion nodes. The results show that the high diffusion risk area of sand source is 11 267.8 km2, accounting for 5.54% of the total area in Hotan area of Xinjiang, and it mainly distributes in central Hotan county, northern Moyu county, central and southern Minfeng county; the first-level sand source area is 8 290.18 km2, the second-level sand source area is 1 955.76 km2, and the third-level sand source area is 1 021.93 km2; the areas with higher diffusion path density of sand source are concentrated in the northwest part of Hotan area, where sand source diffusion is the strongest, and sand source diffusion is concentrated in the southeast part, while diffusion path of sand source is few in central part, and the diffusion effect of sand source is the weakest; class Ⅰ diffusion nodes of sand source are located in the crisscross area of oasis and desert, which is the key node of sand control and prevention. The above results could provide a suggestion for decision-making in desertification prevention and control in Hotan area. At the same time, as an exploration of the “source-sink” theory applied to diffusion path of sand source, it could provide a reference for the relevant research in the future.

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Last Update: 2020-09-20