摘要
选取栖霞小流域为例,以地理信息系统和遥感技术为平台,对近10 a来冲沟发育进行了定量研究,发现近10 a来冲沟面积增加了13.3%,冲沟数量基本保持不变。通过对冲沟在不同高程、坡度、坡向和土地利用等影响因子的分异特征研究发现,在不同的时空变化下,冲沟受人为和自然两方面的影响,但人类活动对冲沟的影响要大于自然过程,因此要特别注意采用合适的耕作方式并采取工程措施保持水土。
Gully erosion is a serious environmental problem in the world.Its development is represented by the soil erosion which became worse.Gully erosion is a very important source of sediment.At present,the study on gully erosion is mainly concentrated on the small scale areas.This article selected a small basin in Qixia by GIS and RS,and had a quantitative research about the gully development in 10 years.Finally,we found that the area of gully erosion increased 13.3%,and the amount of gullies remain unchanged.At the different altitude,the gradient,the aspect and the land use,the development of the gully erosion had a different tendency.Under the various space and time change,the gully affected by the natural and anthropogenic influence each other.But the anthropogenic influence was stronger than natural influence.So in the future,we must pay special attention to adopt the appropriate cultivation way to protect gully erosion.
出处
《地理空间信息》
2013年第1期43-45,48,共4页
Geospatial Information
基金
国家自然科学基金资助项目(41001160)
山东省高等学校科技计划资助项目(J11LE12)
山东省中青年科学家奖励基金资助项目(BS2011NY005)
关键词
高分辨率影像
冲沟
分异特征
时空变化
high spatial-resolution image,gully erosion,heterogeneity,space and time change
