黄土丘陵区廊道研究初探

以景观生态系统理论为指导,对黄土丘陵区进行了地貌景观结构分析,确定了其“廊道、斑块、基质”的景观模式,认为黄土堆积物可被看作为黄土丘陵区的基质;墚、塬、峁、台地和残塬等为被侵蚀的一种残存斑块;沟谷、河谷和道路是主要的廊道。提出了沟谷廊道的概念,初步分析了沟谷廊道在黄土丘陵区的特点:三道合一、分布自相似性、延伸速度快、水土流失的通道以及道路廊道狭窄。从景观生态理论与沟谷廊道治理目标相结合的观点出发,提出了优化整治的原则与治理措施,认为黄土丘陵区沟谷廊道的研究在生态环境治理和社会经济发展方面具有重要的研究价值。

PRELIMINARY STUDY ON CORRIDOR OF LANDSCAPE IN THE LOESS HILLY REGION

The landscape pattern which consisted by corridor,patch,matrix at the basis of the specific landform in the Loess hilly region,were evaluated according to theory of landscape ecology.They were opinions that loess deposit could be as matrix of the region,liang,yuan,mao,terrace and tattered loess yuan were served as a kind of eroded remanent patch,chanel,river and road were main corridors.The gully as a corridor was thought a key concept for soil and water loss controlling and social and economical development.The characteristic of gully corridor in this area was preliminarily analysed: the functions which road,gully and channel were combined as one flow routine,self-similar of distributing,rapidness of extend velocity,passage of soil and water loss,strait road.Principles and harness measures of optimized renovation were brought up based on the viewpoints of combination of the theories of landscape ecology and management objective of the gully as a corridor.The gully as a corridor had an important significance for ecological environment rebuilding.