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Assessing ecological security at the watershed scale based on RS/GIS: a case study from the Hanjiang River Basin

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Abstract

The purpose of this study is to develop an assessment framework of ecological security at the watershed scale to meet the need of watershed management, and to assess ecological security using this framework in the middle and lower reaches of Hanjiang River Basin (in Hubei Province, China). The states and their changes of ecological security in the study region are investigated with the support of ERDAS and ARC/INFO platform. The results show that the ecological security index (P) values in 1995 and 2000 were 0.685 and 0.699 respectively in the study region. While in 2005 and 2010, the P values were decreased to 0.657 and 0.624. In 1995, there were 5 counties with degree II state (the poor state) of ecological security, and 14 counties with degree III state (the common state). By 2000, the amount of counties with degree II decreased to 4 counties. And the number of counties with degree II is the same as 2000 in 2005. The result of 2010 shows there were 12 countries with degree III state as well as 7 counties with degree II state. The results of our case study of the Hanjiang River Basin reflect that the ES situation is very grim in the study area. The degree of ecological security developed in this study can be used as a useful tool for watershed managers and decision-makers.

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Acknowledgments

The work is funded by the Natural Science Fund of China (No. 41001125), and the Natural Science Fund of Hubei Province, China (Item name: The ecological security effect of land use and land cover change in the Hanjiang River Basin, Hubei Province, China, No. 2008CDB046).

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  1. College of Urban and Environmental Sciences, Central China Normal University, Wuhan, 430079, People’s Republic of China

    Guangming Yu, Shu Zhang, Qiwu Yu, Yong Fan, Qun Zeng, Lei Wu, RuiRui Zhou, Na Nan & Pengjie Zhao

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  1. Guangming Yu
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  2. Shu Zhang
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  3. Qiwu Yu
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  9. Pengjie Zhao
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Correspondence to Guangming Yu.

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Yu, G., Zhang, S., Yu, Q. et al. Assessing ecological security at the watershed scale based on RS/GIS: a case study from the Hanjiang River Basin. Stoch Environ Res Risk Assess 28, 307–318 (2014). https://doi.org/10.1007/s00477-013-0750-x

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