半干旱黄土区沟间地浅沟分布特征

干旱区研究 ›› 2011, Vol. 28 ›› Issue (4): 586-591.

半干旱黄土区沟间地浅沟分布特征

赵维军, 许智超, 张岩, 朱岩, 朱清科

北京林业大学水土保持与荒漠化防治教育部重点实验室, 北京 100083

收稿日期:2010-05-19 修回日期:2011-01-19 出版日期:2011-08-25 发布日期:2011-09-06
作者简介:赵维军(1985-),男,安徽砀山人,在读硕士,研究方向森林生态.E-mail:zhaoweijun20050920@163.com
基金资助:
十一五科技支撑课题"困难立地工程造林关键技术研究"(2006BAD03A0302)和交叉学科北京市重点学科建设项目资助

Study on Distribution of Ephemeral Gullies in Semiarid Loess Area

ZHAO Wei-jun, XU Zhi-chao, ZHANG Yan, ZHU Yan, ZHU Qing-ke

Key Laboratory of Soil and Water Conservation & Desertification Combat, Beijing Forestry University, Ministry of Education, Beijing 100083, China

Received:2010-05-19 Revised:2011-01-19 Published:2011-08-25 Online:2011-09-06

摘要/Abstract

摘要： 浅沟侵蚀是半干旱黄土区坡面土壤侵蚀的重要方式。基于陕北吴起县2004年SPOT影像,提取各小流域的浅沟分布,并结合吴起县境内35个小流域土地利用调查数据,分析沟缘线以上土地利用、坡度与浅沟分布的相关性。结果表明浅沟密度依次为:丘陵区旱地＜林地＜草地;各土地利用类型的浅沟密度存在显著差异。同时,在各类土地利用类型上浅沟密度与平均坡度呈显著正相关,浅沟主要分布在25°～35°的坡度段上。研究结果可为该区域生态修复和水土保持提供参考。

关键词: 浅沟密度, 坡度, 土地利用, 土壤侵蚀, 黄土丘陵区, 吴起县, 陕北

Abstract: Ephemeral gully (EG) erosion is one of the important ways of soil erosion in semiarid loess area. Extraction of ephemeral gullies from small watersheds was based on the SPOT image of Wuqi County in 2004, and the correlations between land use, slope and distribution of ephemeral gullies above shoulder line of valleys were analyzed based on the investigated date of land use in 35 small watersheds in Wuqi County, north Shaanxi Province. The results reveal that the EG density was in an order of hilly dry land < woodland < grassland; the EG density is significantly different from different land use types. Correlation analysis reveals that there was a positive correlation between the average slope and EG density in the same land use types, and ephemeral gullies are mainly distributed in a slope range from 25° to 35°. The study results can be referred in regenerating the ecology and conserving water and soil.

Key words: density of ephemeral gully, slope, land use, soil erosion, Loess hilly-gully region, Wuqi County, north Shaanxi Province

中图分类号:

S157.1

赵维军, 许智超, 张岩, 朱岩, 朱清科. 半干旱黄土区沟间地浅沟分布特征[J]. 干旱区研究, 2011, 28(4): 586-591.

ZHAO Wei-jun, XU Zhi-chao, ZHANG Yan, ZHU Yan, ZHU Qing-ke. Study on Distribution of Ephemeral Gullies in Semiarid Loess Area[J]. , 2011, 28(4): 586-591.

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