JOURNAL OF NATURAL RESOURCES ›› 2015, Vol. 30 ›› Issue (9): 1449-1460.doi: 10.11849/zrzyxb.2015.09.003

• Resource Ecology • Previous Articles     Next Articles

The Land Use Change and Landscape Pattern Response Driven by YU-YI Expressway (Chongqing Section)

HUANG Yonga, b, LI Yang-binga, b, YING Honga, b   

  1. a. College of Geography and Tourism, b. Chongqing Municipal Key Laboratory of GIS Application, Chongqing Normal University, Chongqing 401331
  • Received:2014-10-15 Revised:2015-03-22 Online:2015-09-15 Published:2015-09-15

Abstract:

In order to clarify the influence of roadways on the land use and landscape pattern and the range and intensity of the influence, the 15 km distance’s buffer zones at both sides of the Yu-Yi Expressway from Chongqing to Wushan was chosen as the study area. This section of the road was divided into four segments according to the landform along the road. Based on the data of the remote sensing images in 1986, 2000, 2007 and 2013, and by using ArcGIS software and method of landscape ecology, the paper studied the land use and landscape pattern changes driven by the expressway at three scales. The results show that, in the period from 1986 to 2013, the dispersed land use changed areas developed to an axis along the expressway. The effect zones of the expressway in the west low mountain and hill, the low mountain and strath, and the mid-low mountains gorge area are 10 km, 7 km and 5 km respectively, and it is not obvious in the east middle mountain and valley area. As a whole, the highly explored lands cluster in the 3 km buffer range along the road, and the land use degree decreases from west to east in the study area. The influence of the expressway on landscape structure is within a certain area. In the low mountain and hill at the west and the low mountain and strath area, the changes of landscape pattern mainly happen in the 5 km buffer range, and in 4 km and 3 km buffer range in the middle-low mountain and valley area and middle mountain and valley area, respectively. The landscape structure becomes increasingly fragmented, and the landscape stability within the influenced area decreases greatly, which exposes ecological landscape to more risks. The spatial differences of land use and landscape pattern change are related with the opening time of the expressway, and are also influenced by regional economy, terrain factors, and environmental policy. This research is beneficial for understanding the effect of the road in fragile ecological areas, and the conclusion of this study may provide scientific basis for the regional transportation planning and sustainable land utilization.

CLC Number: 

  • X37