金沙江干热河谷区攀枝花市土地退化初探

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 成都山地所知识仓储（2009年以前）

	金沙江干热河谷区攀枝花市土地退化初探
	张建平 1,2; 刘淑珍1
刊名	中国沙漠
	1998
卷号	18 期号:2 页码:149-153
关键词	金沙江干热河谷攀枝花市土地退化
ISSN号	1000-694X
其他题名	A PRELIMINARY STUDY ON LAND DEGRADATION IN PANZHIHUA CITY ON JINSHA RIVER DRY-HOT VALLEY AREA
通讯作者	张建平
中文摘要	金沙江河谷区由于河谷深切、焚风效应显著、气候干热、生态环境脆弱，加上人类活动的强烈干扰，使水土流失加剧及土地退化甚至荒漠化的发生和发展。位于金沙江干热河谷的攀枝花市土地退化面向占本市总面积的４９．１％，轻度、中度、强度和极强度退化土地面积分别占总土地面积的３７．２％、８．２％、３．２％和０．５％。土地退化使土层变薄、肥力下降、土地生产力降低，破坏水利设施、影响水利工程效益，加剧自然灾害。
英文摘要	In the arid and semi-arid areas of northern China, wind-erosion land desertification is very severe. But in the humid and semi-humid areas of so uthern China, water-erosion land degradation shouldn`t be called desertification. So the concept "land degradation" is used here. On Jinsha River valley area, because of deep-cut valley (gully), remarkable foehn effect , dry-hot climate and fragile eco-environment, as well as the intensive human activity, soil erosion is being aggravated, which causes land degradation. The area of degraded land of Panzhihua city located on Jinsha River dry-hot valley makes up 49.1% of the total area of the city. Among them, light deg raded, moderate degraded, sever edegraded and extremly severe degrated land respectively makes up 37.2%, 8.2%, 3.2% and 0.5% of the total area. On one hand soil erosion makes the soil layer of cultivated land thinnerd, fertility lowered, soil texture coar sened, and land product ivity decreased. Every year, water erodes 1.5mm thick of the soil, which equals to 0.3m thich of soil layer of 1220 hm^2 is washed away. On the other hand soil erosion makes great amounts of sediments silt up the river bed and reservor, which lessens drainage ablility, causes severe flood disaster and inperils the people and cultivated land in the velley. Over 60% of the ponds, canal bed and reserv or in the city are severely silted up, and lots of manpower are need to dig the sediments every year. Land degradation maybe also bring about disasters such as landslides and debris flow. The influencing factors of land degradation are composed of natural ones and anthropogenic ones. Natural factors mainly include complicated landscape and geological tectonics, easy wheathering rock, high temperature and evaporation, dryclimate, concentrated precipitation and frequent rainstorm; anthropogenic factors include rapid population increasing, high population density, high cultivation rate, simple-extensive cultivation, deforestation denudation, mining and wastes discharge etc. . The countermeasures of land degradation are as follows: formulate correct policy to prevent and control land degradation; strictly control the increase of population; strengthen propag and a to heighten the peasant specological consciousness; preotect existing forest and streng then tree-planting; consolidate and strengthen the capital construction of farmland and water conservancy.
学科主题	S151,P5
分类号	S151,P5
收录类别	CSCD ; 北大中文核心
资助信息	国家自然科学基金
语种	中文
CSCD记录号	CSCD:477870
公开日期	2010-08-06
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/1271]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）
作者单位	1.兰州大学地理学 2.中国科学院水利部成都山地灾害与环境研究所
推荐引用方式 GB/T 7714	张建平,刘淑珍. 金沙江干热河谷区攀枝花市土地退化初探[J]. 中国沙漠,1998,18(2):149-153.
APA	张建平,&刘淑珍.(1998).金沙江干热河谷区攀枝花市土地退化初探.中国沙漠,18(2),149-153.
MLA	张建平,et al."金沙江干热河谷区攀枝花市土地退化初探".中国沙漠 18.2(1998):149-153.