干旱区生态环境知识资源中心(Arid): 典型喀斯特石漠化治理区水土流失特征与关键问题

Arid

	典型喀斯特石漠化治理区水土流失特征与关键问题
其他题名	Features of Soil and Water Loss and Key Issues in Demonstration Areas for Combating Karst Rocky Desertification
	熊康宁; 李晋; 龙明忠
来源期刊	地理学报
ISSN	0375-5444
出版年	2012
卷号	67 期号:7 页码:878-888
中文摘要	喀斯特地区的水土流失资料很缺乏,传统的研究方法很多不适用,为科学地认识喀斯特石漠化治理区水土流失的特征与变化规律,制定符合喀斯特环境的防治对策,2006-2010年间,结合石漠化治理工程,对鸭池、红枫湖、花江典型示范区进行了长期的水土流失定位监测,结果显示,总体上各研究区在生态及工程治理后土壤侵蚀量明显下降,地貌类型从宏观上控制着各区域的侵蚀特征,高原山地土层厚,大量陡坡开垦,水土流失严重;高原盆地自然条件较好,发展生态畜牧和生态农业,侵蚀量较小;高原峡谷经历早期的剧烈流失后,现阶段几近无土可流,侵蚀量极低。生态修复是石漠化治理的核心,水保林、封禁治理的生态效益好,草地畜牧业和经济林模式能带来良好经济与水土保持效益。不同等级石漠化的坡度与土被组合特征差异显著,对土壤侵蚀量有强烈的控制作用,今后应根据石漠化等级细化喀斯特地区的水土流失分级和制定合适的治理措施。地下流失受研究深度所限,目前尚无法准确判断其在地表地下水土流失总量中的贡献率,对落水洞等关键部位进行工程防治能大大降低其危害性。
英文摘要	Very little information on water and soil loss in karst areas is available. Moreover, traditional methods of assessing soil loss are difficult to apply to this area. In this paper the authors analyze the features of water and soil loss based on location monitoring during the five years (2006-2010), in demonstration areas for combating karst rocky desertification (KRD). The following conclusions are obtained. (1) Soil erosion showed a decreasing trend after a series of comprehensive treatments in the three study regions, and erosion was macroscopically mitigated in terms of landform types. (2) The slope cropland is distributed extensively in Yachi mountain region and erosion is thus serious. With better natural conditions and ecological economy development, erosion in Hongfenghu basin is relatively weak. Due to the severely poor soil cover, the amount of soil erosion is extremely low in Huajiang gorge. (3) Ecologic rehabilitation is the key to combat KRD. Closing hillsides to facilitate afforestation and water conservation are effective measures for the mitigation of soil and water loss. Grassland and economic forests bring both economic and ecological benefits. (4) KRD degrees differ greatly in slope gradient and soil layer. Further classification for soil erosion in karst areas should be proposed based on KRD degrees. (5) Hazard evaluation of subterranean soil loss is one of the tough tasks at present. However, control of key parts such as sinkholes is the efficient way to prevent subterranean loss.
中文关键词	喀斯特环境 ; 石漠化治理 ; 土壤侵蚀 ; 贵州
英文关键词	karst environment combating rocky desertification soil erosion Guizhou
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4582922
来源机构	贵州师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227862
作者单位	贵州师范大学中国南方喀斯特研究院, 贵州省喀斯特山地生态环境国家重点实验室培育基地, 贵阳, 贵州 550001, 中国
推荐引用方式 GB/T 7714	熊康宁,李晋,龙明忠. 典型喀斯特石漠化治理区水土流失特征与关键问题[J]. 贵州师范大学,2012,67(7):878-888.
APA	熊康宁,李晋,&龙明忠.(2012).典型喀斯特石漠化治理区水土流失特征与关键问题.地理学报,67(7),878-888.
MLA	熊康宁,et al."典型喀斯特石漠化治理区水土流失特征与关键问题".地理学报 67.7(2012):878-888.