宁省土壤侵蚀和侵蚀沟发展的影响因素.pdf
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安徽农业科学,JournaI of Anhui Agri. Sci. 2007 ,35 (1 ):207 - 209 ,246 责任编辑 陈娟 责任校对 孙能森
辽宁省土壤侵蚀和侵蚀沟发展的影响因素
方广玲,郭成久,范昊明,杨瑞坤 (沈阳农业大学水利学院,辽宁沈阳110 161 )
摘要 概述了辽宁省气候、地质构造、地形、地貌、土壤及社会人文环境,分析了这些环境因素对辽宁省土壤侵蚀与侵蚀沟发展的影响。
结果表明,辽宁省土壤侵蚀产生和加剧是多种因素共同作用的结果。辽西、辽东和辽中等不同区域土壤侵蚀强度与侵蚀沟分布密度存
在差异,这种差异正是侵蚀环境不同造成的。在人类活动、土地利用不合理的条件下,某些自然因素对土壤侵蚀的影响明显地凸现出
来,侵蚀沟的产生与发展是土壤侵蚀达到严重程度的标志。
关键词 辽宁省;土壤侵蚀;侵蚀沟;环境
中图分类号 S 15 文献标识码 A 文章编号 0517 - 6611(2007 )01 - 00207 - 03
Study on Influence Factors of Development of Soil Erosion and Erosion Gully in Liaoning Province
FANG Guang-ling et al (Water Conservancy Institute ,Shenyang AgricuIturaI University ,Shenyang ,Liaoning 110161)
Abstract The reIationships between soiI erosion and erosion guIIy in Liaoning province and cIimate environment ,geoIogicaI structure ,terrain
and Iandforms,human activity have been anaIyzed. With aII these factors,soiI erosion and guIIy erosion became intensified. In this research ,it
pointed that about the erosion intensity and density distribution of erosion guIIy there are existed some differences between the western ,eastern and
midist area of Liaoning province ,and the differences were connected with the difference of erosion enviorment. The authors found ,the activity of
geoIogic structure has caused the formation of erosion guIIies with Iarge scaIe and middIe size. Because the human activities,some physicaI factors
might aggravate the soiI erosion. The formation and deveIopment of erosion guIIy iIIustrated that the soiI erosion has become acute.
Key words Liaoning province ;SoiI erosion ;Erosion guIIy ;Enviorment
沟蚀是水力侵蚀类型中常见的侵蚀形式,虽然涉及面积 1. 1. 1 降雨量。辽宁省年平均降雨量400 ~ 1 100 mm ,季节
[1]
不如面蚀广,但其对土地的破坏程度远比面蚀严重 ,而且 分配极不均匀。表1、2 为英金河水系中银河上的初头朗水
沟蚀造成的后果可以更为直观的观测到。辽宁省每年有大 文站的观测资料
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