治沟造地工程驱动的流域土地利用和景观格局变化——以黄土丘陵沟壑区典型流域为例(英文)

来源 :Journal of Geographical Sciences | 被引量 : 0次 | 上传用户:jx34343
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Exploring the impact of land consolidation on the changes of local land use and the landscape patterns is important for optimizing land consolidation models and thus accelerating the sustainable development of local communities. Using a typical small watershed in Yan’an City(Shaanxi, China), the impact of gully land consolidation on land use and landscape pattern change, based on high-resolution remote sensing image data and landscape pattern analysis, was investigated. The results showed that:(1) The terraces,sloping fields, shrub land and grassland at the bottom and both sides of the gully were converted mainly to high quality check dam land. Also, some of the shrub land, due to biological measures, was converted to more ecologically suitable native forest. Thus, the areas of check dam land and forests increased by 159 and 70 ha, while that of shrub land,grassland and sloping fields decreased by 112, 63 and 59 ha, respectively.(2) The average patch area and patch cohesion index for the check dam land increased, which indicated that the production function improved. The landscape shape index and the patch cohesion index for forestland and shrub land were maintained at a high level, and thus the ecological function remained stable.(3) At the watershed level, the degree of fragmentation of the landscape decreased and the landscape became more diversified and balanced; the anti-jamming capability of the landscape and the stability of the ecosystem improved also. Research suggests that implementing gully land consolidation in a rational manner may contribute to improvements in the structure of local land use and the patterns of landscape.
其他文献
为了探讨中国的传统农业对未来的生态农业的作用,本文对农业发展历史、传统农业已经发掘的一些例证加以论述,并注意到其优势和局限。研究表明中国传统农业实践经验是建立在一
目的:探讨膝关节痛风性关节炎的CT和MRI影像特征。方法:回顾分析经手术病理证实的21例膝关节痛风性关节炎的CT和MRI表现,其中12例CT,14例MRI。结果:所有病例均能发现痛风结节
文章认为在吉尔吉斯斯坦宪政民主制度下,威权下的权力政治根深蒂固,降低着民主制度的适应能力,在制度与权力之间形成了一种错综复杂的结构性矛盾,这种结构性矛盾导致宪政制度
本文首次运用显微CT技术对中国早期料珠进行研究。X-射线衍射(XRD)及CT切片分析结果表明,河南淅川县马川墓地出土的料珠为玻璃珠,与西周时期的釉砂珠在结构上存在显著区别。
如何定量评估城市轨道交通开发对周边房地产所带来的增值效应,一直是困扰理论界和实务界的重要问题。以深圳地铁一期为例,从"区位特征、邻里特征、结构特征"三方面构建特征价
犬椎间盘突出症是犬常见的一种外科病。它是由椎间盘变性向背侧或腹侧突出压迫脊髓或因椎间钙化致使椎间狭窄而引起患犬后躯感觉和运动障碍的一种疾病~([1])。主要表现为腰背
大学生学科竞赛能够培养学生的创新意识和实践动手能力,同时也是大学教师教学业绩和大学教学质量评估的要素。然而,优秀的学科竞赛成绩离不开大学教师的教学与指导。论文以“
目的:探讨肝脏不典型血管瘤的影像学误诊原因及防治对策。方法:对1996年1月~2006年1月术前误诊的20例肝脏不典型血管瘤临床资料进行回顾性分析。结果:本组误诊为肝细胞癌10例
“‘哪里可见动听?’我示意学生接着描述。”‘鸟啭。’“‘”啭“是什么意思?’”‘婉转。’“读戴启江老师的课堂描述,心陡然一颤,很快就想起宋代诗人黄庭坚的诗句:”百啭
期刊
目的 :对照观察免疫吸附和血浆置换治疗自身免疫性疾病的临床疗效及安全性。方法 :14例自身免疫性患者 ,原发病为原发性小血管炎 6例、抗肾小球基膜抗体肾炎 5例、系统性红斑