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| The influence of land use change and socioeconomic factors on the water quality of typical reservoirs in Hunan Province, China |
| Received:December 25, 2017 |
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| KeyWord:land use;socioeconomic factors;water quality;driving force;grey correlation analysis |
| Author Name | Affiliation | E-mail | | YANG Ze-dong | School of Land Science and Technology, China University of Geosciences, Beijing 100083, China | | | QIN Zhi-heng | School of Land Science and Technology, China University of Geosciences, Beijing 100083, China
Institute of Soil and Solid Waste Environment, China Research Academy of Environmental Science, Beijing 100012, China | | | BAI Zhong-ke | School of Land Science and Technology, China University of Geosciences, Beijing 100083, China
Key Lab for Land Consolidation, MLR, Beijing 100083, China | baizk@cugb.edu.cn | | HAO Yi-cheng | School of Land Science and Technology, China University of Geosciences, Beijing 100083, China
Institute of Soil and Solid Waste Environment, China Research Academy of Environmental Science, Beijing 100012, China | |
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| Abstract: |
| Land use changes and social economy development greatly influence the water quality of reservoirs. Dongjiang Lake, Shuifumiao Reservoir, and Datong Lake, which are three typical reservoirs in Hunan, were the subjects of this research. On the basis of remote sensing interpretation results of land use types, socioeconomic statistics, and water quality monitoring data, principal component analysis and grey relational analysis were used in this study to investigate the driving forces of water quality change in the study area, and comparative analysis was performed. The results showed that the main type of land use in the Dongjiang Lake basin was woodland, that in the Datong Lake basin was mainly cultivated land, and the proportions of cultivated land and woodland in the Shuifumiao Reservoir basin were not very different. The impact of land use types and human activities on the three reservoirs differed. The main driving factors for Dongjiang Lake water quality change were economic factors and the area ratios of forestland and construction land. The main driving forces for the water quality change of Shuifumiao Reservoir were the changes of economic factors, proportion of construction land, and cultivated land area. The major driving forces of Datong Lake water quality change were economic factors, demographic factors, and the proportion of the construction land area. The order of the reservoirs in terms of pollution level, from high to low, was Datong Lake > Shuifumiao Reservoir > Dongjiang Lake. |
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