RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (10): 1566-1575.doi: 10.11870/cjlyzyyhj201610011

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IMPACTS OF COUNTY ROAD CONSTRUCTION ON LANDSCAPE PATTERN ALONG THE ROADS IN MOUNTAINOUS AREA——A CASE STUDY IN JIANGJIA WATERSHED, DONGCHUAN DISTRICT, Kunmin CITY

LIN Yong-ming1,2, GE Yong-gang3, WANG Dao-jie3, ZHUANG Jian-qi4, CHEN Can1,2, WU Cheng-zhen1,5   

  1. 1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2. Key Laboratory for Forest Ecosystem Process and Management of Fujian province, Fuzhou 350002, China;
    3. Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China;
    4. College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China;
    5. College of Ecology and Resource Engineering, Wuyi University, Nanping 354300, China
  • Received:2016-01-14 Revised:2016-03-23 Online:2016-10-20
  • Supported by:
    the Key Sci-Tech Project of China(No.2012BAC06B02-02)

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Abstract: At present, the effects of road construction on ecological processes and hazards of the region have aroused the interest of researchers, but little is known about the effects on landscape pattern in small-scale regions such as watersheds. In this paper, based on the aerial photograph in 1973, Landsat TM image in 1995 and QuickBird remote sensing image, we used Remote Sensing (RS), Global Positioning System (GPS) and Geographical Information System (GIS) technologies to carry out landscape classification and mapping along the roads constructed in the Jiangjiagou watershed, Dongchun District, Kunming City, Yunnan Province. Subsequently, we analyzed landscape pattern change before and after road construction at the landscape and patch levels using Fragstats 3.3 software. The results showed that:1) the area of slope farmlands decreased and that of terraced fields increased along the roads constructed in different periods, which were similar to the percentage change of slope farmlands and terraced fields along all roads and different distance gradients. In addition, the area of coniferous forests and shrubs decreased and that of grasslands increased within different distance gradients. 2) at the patch level, patch types along the road constructed before 1973 were mainly affected by human activities with complicated shapes and high fragmentation, but those along the road constructed after 1973 were affected by human and hazard activities with more vegetation patches and obvious fragmental trend. Moreover, at the landscape level, landscape diversity increased and landscape connectivity decreased with high fragmentation. In addition, the spatial connectivity increased along the road constructed before 1973, but it decreased along the road constructed after 1973. Landscape pattern along all roads was mostly affected by roads within a 150 m range.

Key words: watershed, road effects, landscape pattern, fragmentation

CLC Number: 

  • K903
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