QQ客服 官方微博 反馈留言

题名	黄土丘陵区土壤水资源及其评价
学位类别	硕士
答辩日期	2008
授予单位	中国科学院研究生院
授予地点	陕西
导师	穆兴民 ; 高鹏
学位专业	水土保持与荒漠化防治
中文摘要	黄土丘陵区是西部地区乃至我国水土流失最为严重的地区之一。为了有效控制这一地区的水土流失，建设一个稳定的植被生态系统处在关键的地位，而土壤水资源是这一地区规模化植被建设的核心问题。论文以黄土丘陵区土壤水资源为研究对象，在总结土壤水研究现状和对土壤水资源特性认识的基础上，探讨了土壤水资源的概念及内涵，研究了黄土丘陵区典型区域内土壤水资源的分异规律。取得了以下主要成果：在分析黄土丘陵区土壤水资源的特性基础上，从植物利用范围出发，完善土壤水资源概念。土壤水资源指：植物根系可吸收利用的范围其补给主要来源于大气降水，能被植物(包括农作物)及土壤微生物所利用并可以恢复和更新的土壤水的数量。围绕土壤水资源的特性，遵循科学性、系统性、层次性、实用性与可操作性的原则，认为土壤水资源评价主要包括土壤水资源转化规律、土壤水资源补给量、土壤水的分异规律以及土壤水资源可利用量。以黄土丘陵区绥德辛店沟和天水大柳树梁家坪为研究对象，分析了影响降雨－土壤水转化的因素；以延河流域为研究对象，计算了全流域在系列年的平均土壤水资源补给量。黄土丘陵区土壤水资源的分异规律表现为从东向西、从南到北逐渐减少；从坡顶到沟底逐渐增大；不同坡位土壤水资源量差异性表现在浅层小，深层大，且坡面普遍大于山顶；耗水特征相似的植被，因地形不同，其土壤水资源量差异显著。以黄土丘陵区典型区域为研究对象，利用水资源补给量计算方法，计算了该区域不同土地利用类型土壤水资源量。
英文摘要	Loess Hilly Region in the Loess Plateau is one of the most serious area of water and soil loss in the west China and even in the whole country. In order to effectively control soil erosion in this area, establishing a stable vegetation ecosystem is in the key position, and soil water resource is the key problem of large-scale vegetation construction in this region. In this article the soil water resource of the loess hilly region were the subjects. Based on summary of the current situation of soil water research and understanding of soil water resource characteristics, the connotation of soil water resources was deeply discussed. The transformation law and distribution features of soil water resource were analyzed. The paper had gotten progress in the following aspects.Based on analyzing soil water resources characteristics in the Loess Hilly Region, soil water resource was redefined standing on water cycle process by using the definition of water resources-according to plant using range.Based on the characteristics of soil water resources, following the principles of reasonableness, systematization, hierarchy, practicality and maneuverability. The     evaluation content mainly included the transformation law of soil water resources, soil water resources quantity calculation in watershed-scale, regional differentiation and quantity evaluation of available soil water resources.We studied Xindiangou and Liangjiaping in the Loess Plateau to analyze the factors, such as precipitation, slope, land uses and land type, which had an effect on the transformation between rainfall and soil water, using the data of runoff plots. On the evaluation of regional soil water resources, YanheRiver basin was studied, and the average recharge amount of soil water resources of the whole basin in the 13years was calculated.The differentiation law of soil water resources in Loess Hilly Region was analyzed. The horizontal differentiation law of soil water resources decreased gradually from the east to the west and from the south to the north. The vertical differentiation of soil water resources was analyzed, which showed that the soil water contents increased from sloping top to ditch bottom. From the whole soil profile, the differentiation characteristics of soil water contents in different slope positions showed that the shallow layer was lower than the deeper layer, and soil moisture in the slope was generally higher compared to the hilltop. Vegetations with similar water consumption characteristics had significant differences in soil moisture due to different terrain, and soil moisture was changed with different exposure.The soil water contents of different vegetation types , soil water resource was calculated.
公开日期	2011-07-01
内容类型	学位论文
源URL	[http://ir.iswc.ac.cn/handle/361005/4103]
专题	水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式 GB/T 7714	. 黄土丘陵区土壤水资源及其评价[D]. 陕西. 中国科学院研究生院. 2008.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。