30年来武昌湖湿地退化过程与原因

doi:10.11821/dlxb201411010

Abstract

Abstract:

The lake-wetland ecological system is sensitive to climate change and human activities. This study investigated the ecological changes of Wuchang Lake wetland (located at the downstream of the Yangtze River) from 1980 to 2010, and the potential causes of wetland degradation. We first overviewed the landscape changes in the study area by analyzing the Landsat MSS/TM imageries; and then examined the dynamics of hydrometeorology during the study period. Based on the analysis of changes of landscape patterns and variations of hydrometeorological variables, the natural and anthropogenic causes of Wuchang Lake wetland ecosystem degradation were discussed and differentiated. Results show that over the past three decades the total area of Wuchang Lake has decreased by 40%. In particular, area of the Qingcao Lake at the downstream of the lake-wetland system has over 73%, from 52.76 km² to 13.92 km². The area of construction land, which manifests the human activity in the watershed, had increased significantly since the building of the Anjiu Road across the lake. The average annual temperature in the study area showed a significant increasing trend, while the annual rainfall and evapotranspiration were relatively stable with little variations. We concluded that the degradation of the Wuchang Lake wetland was accelerated mainly by constructions in the area and the increased temperature, while the annual rainfall and evapotranspiration had little influence.

Key words: Wuchang Lake, climate change, human activity, wetland degradation

Baohua ZHOU, Jian YIN, Baoshi JIN, Lei ZHU. Degradation of Wuchang Lake wetland and its causes during 1980-2010[J].Acta Geographica Sinica, 2014, 69(11): 1697-1706.

Figures/Tables 7

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References 28

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时间序列变量	Zc	趋势置信度	β	单位
日平均气压	-3.65	99.9%	-0.004	kpa·a^-1
日平均相对湿度	-3.03	99%	-0.093	100%·a^-1
日平均风速	-1.17		-0.012	m·s^-1·a^-1
日平均日照时数	-1.83	90%	-3.097	h·a^-1
日平均潜在蒸散发	-0.21		-0.002	mm·a^-1

	武昌湖总面积	上湖	下湖	建设用地	气温	降水	蒸散发
建设用地	-1.00**	-0.71	-1.00**	1.00	1.00**	-0.60	0.14
气温	-1.00**	-0.71	-1.00**	1.00**	1.00	-0.60	0.14
降水	0.60	0.77	0.60	-0.60	-0.60	1.00	0.26
蒸散发	-0.14	-0.37	-0.14	0.14	0.14	0.26	1.00

Degradation of Wuchang Lake wetland and its causes during 1980-2010

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