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[1]LI Xiaoyan,LIU Shujun,WANG Zhijie.Landscape Ecological Risk Characteristics of Water Source Site in Hanzhong City of the Middle Route of the South-to-North Water Transfer Project of China[J].Research of Soil and Water Conservation,2019,26(05):181-187.

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Landscape Ecological Risk Characteristics of Water Source Site in Hanzhong City of the Middle Route of the South-to-North Water Transfer Project of China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 05 Page number: 181-187 Column: Public date: 2019-09-06

Title:: Landscape Ecological Risk Characteristics of Water Source Site in Hanzhong City of the Middle Route of the South-to-North Water Transfer Project of China

Author(s):: LI Xiaoyan¹, LIU Shujun³, WANG Zhijie²; 1. School of History and Tourism, Shaanxi University of Technology, Hanzhong, Shaanxi 723000, China;
2. College of Life Sciences, Guizhou University, Guiyang 550025, China;
3. College of Tea Science, Guizhou University, Guiyang 550025, China

Keywords:: landscape ecological risk; landscape pattern; Middle Line of South-to-North Water Transfer Project; Hanzhong City

CLC:: X826

DOI:: -

Abstract:: Hanzhong City is a national key ecological function zone, a key area for biodiversity conservation, a core water source conservation area of the Middle Line of South-to-North Water Diversion Project and a major water source. The ecological status of Hanzhong City is prominent, so it is significant to evaluate the ecological environment and its risk of this area. Selecting remote sensing image data of Hanzhong City in 2007, 2011 and 2017, we use the basic principles and methods of landscape ecology and geostatistics, and using RS and GIS spatial information technology to construct landscape ecological risk index of Hanzhong City. The spatial and temporal variation characteristics of landscape ecological risk of Hanzhong City in the past ten years were systematically analyzed. The results showed that:(1) the areas of forest land and construction land in the study area increased continually, and the area of cultivated land was decereasing; the forest land and construction land increased by 426.71 and 215.48 km², respectively, and the cultivated land decreased by 539.33 km² for farmland; (2) the dominant degree of forest land in the study area was the most obvious, and the most rapid increase of the dominant degree was construction land; the fragmentation trend of the landscape pattern in the whole area was obvious; (3) the ecological risk of the study area showed an obvious inverted ‘r’ type distribution; in the past 10 years, the ecological risk of the original concentrated low-risk areas in the middle and high mountainous areas was intensified; the ecological restoration work in the low hilly areas was remarkable and the areas had low ecological risk; (4) there was a strong positive correlation between landscape ecological risk and the spaces in Hanzhong City, but the distribution ranges of ‘high-high’ risk clusters and ‘low-low’ risk clusters were gradually narrowing.

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