[1]MIAO Dan,WANG Shi-ying,LI Bo,et al.Study on Tidal Flat of Huayang Rivers and Lakes District Based on Remote Sensing Dynamic Monitoring[J].Research of Soil and Water Conservation,2014,21(06):158-163,170.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 06
Page number:
158-163,170
Column:
Public date:
2014-12-28
- Title:
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Study on Tidal Flat of Huayang Rivers and Lakes District Based on Remote Sensing Dynamic Monitoring
- Author(s):
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MIAO Dan1,2, WANG Shi-ying1, LI Bo2, LU Shu-bing2, ZHAO Li-qin1,2, NAN Bo2
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1. College of Geography and Resource Science, Sichuan Normal University, Chengdu 610101, China;
2. College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China
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- Keywords:
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region of HuaYang rivers and lakes district; tidal flat; RS; GIS; dynamic changes; Markov chain model
- CLC:
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F301,P407
- DOI:
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- Abstract:
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Based on remote sensing and geography information system, and TM and ETM+ data of the year 1990,2002 and 2010 in the region of Huayang rivers and lakes district were used. We got seven land use types including cultivated land, forest land, grassland, reservoirs and ponds, buildings, lakes and tidal flat, through the method of maximum likelihood. On the view of time and space, the dynamic changes of tidal flat, change ratio and transfer matrix of land use were analyzed. The centroids of tidal flat were analyzed by setting up two patterns along the lakeshore. In the end, following the Markov chain model, future tendency of the land use was predicted, and the results were satisfactory. The results were as follows: first, during 1990—2002, the tidal flat area decreased by 4.44 km2(from 15.67 km2 in 1 990 to 41.23 km2 in 2002); during 2002—2010, it decreased by 10.31 km2(from 41.32 km2 in 2002 to 30.92 km2). The decrease rate during 2002—2010 was faster than that during 1990—2002. The areas of cultivated land, forest land and buildings increased, the increased areas were 96.03 km2, 10.03 km2, 4.32 km2, respectively. The areas of grassland, lakes and reservoirs decreased, the decreased areas were 1.91 km2, 82.46 km2, 11.26 km2, respectively; second, the tidal flat decreased obviously in Fuxing and Zhoutou villages. The chief reason for that is the income mainly comes from farming in these villages, such as significantly inning and reclamation during recent 2 decades. However, the tidal flat in Xiacang village increased because Xiacang is one of the biggest villages with abundant fishery resources, cultivation and reclaim land from lakes lead to lakes dwindling and tidal flats increase gradually; and the major trends of the land utilization in this region are that lakes turned into tidal flat while tidal flat turned into cultivated land; third, by setting up patterns outside one kilometer of lakeshore in Xiacang village and Huikou village, the Changes of the centroid of tidal flat were analyzed, in the Xiacang pattern, the result showed that the centroids of tidal flat in different years obviously centralized and the distance reduced during the study period. It indicated that in this pattern, human activities as lake reclamation were centralized in the east shoreline of Huanghu. At the same time, in the Huikou pattern, the centroids of tidal flat were separated and the distance increased. It’s separated because the exploitation and utilization of tidal flat were separated; last, Markov chain pvediction result showed that the areas of tidal flat and lakes would still decrease in the future, and the areas of cultivated and buildings would increase, while others areas of land types would keep stable. This study can provide scientific basis for the tidal flat protection and rational utilization, and also play an important role in development of fishery in the region of Huayang rivers and lakes area.