Influence of hydrology process on wetland landscape pattern: A case study in the Yellow River Delta |
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| Authors: | Sheng-nan Li Gen-xu Wang Wei Deng Yuan-man Hu Wei-Wei Hu |
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| Institution: | 1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan Province, China;2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, Liaoning Province, China;3. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;1. Pacific Northwest National Laboratory, Coastal Sciences Division, Marine Sciences Laboratory, 1529 West Sequim Bay Road, Sequim, WA 98382, United States;2. Columbia Land Trust, 850 Officers’ Row, Vancouver, WA 98661, United States;1. Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, PR China;2. Research Center of Marine Ecology, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, PR China;1. The First Institute of Oceanography, State Oceanic Administration, Qingdao, Shandong Province, 266061, PR China;2. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong Province, 266061, PR China;3. Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou University, Binzhou, Shandong Province, 256603, PR China;1. Institute of Ecology and Biodiversity, School of Biological Sciences, Jinan 250100, Shandong University, PR China;2. International Institute for Industrial Environmental Economics, SE-221 00 Lund, Lund University, Sweden;3. School of Environmental Science and Engineering, Shanghai 200240, Shanghai Jiaotong University, PR China;1. College of Urban and Environment Science, Tianjin Normal University, Tianjin, 300387, China;2. College of Environment Science and Engineering, Nankai University, Tianjin, 300071, China |
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| Abstract: | A comprehensive study using ecological engineering analysis was conducted on the influence of the hydrology process in the Yellow River Delta. It was found that water and sediment played an important role in the formation and maintenance of the estuarine wetland. Based on hydrological data (1950–2005), meteorological data (1954–2005) and landscape data produced from integrated Landsat TM images of the Yellow River Delta, the relationship among all the above factors has been analyzed. The results indicated that runoff, sediment discharge and the area of the reed marsh wetland, meadow wetland and tidal wetland had evidently decreased from 1986 to 2001. The runoff and sediment discharge into the Yellow River Delta at a rate of 200–300 × 108 m3 and at 5–8 × 108 t, respectively, were probably the most optimal range for maintaining the stable wetland landscape pattern. Regression analysis and principal component analysis showed that there was a strong positive correlation between the area of wetland landscape and runoff, sediment discharge, whereas there was a negative correlation between the area and the temperature, and there was no significant trend with precipitation levels. The water and sediment discharge are the dominant variable factors of the wetland. Human activities also have an important influence on transformation of wetland types as well as wetland degradation. Therefore, with economic development, climate change and sustainable utilization of resources, great attention should be paid to the changes of natural landscape and their causes. |
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