| Study on relationship between land use and terrain factor based on DEM——Taking Zhangdigou small watershed as an example |
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| DOI：10.7606/j.issn.1000-7601.2012.02.35 |
| Key Words: DEM land use terrain factor small watershed |
| Author Name | Affiliation | | HE Jingying | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHANG Tongyan | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Guanglu | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHOU Maoling | Water and Soil Conservation Working Station of Yangxian, Yangxian, Shaanxi 723300, China |
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| Abstract: |
| Based on remote sensing data and DEM data, we studied the distribution characteristics of land use in the condition of different terrain factors by introducing the terrain distribution index and the comprehensive index of land use degree, and then analyzed the Kendall double parameters correlation, revealed the relationship between land use and terrain factors in Zhangdigou small watershed. The results showed that the distribution of land use in the watershed is basically in accordance with natural laws. Human activities are mainly on the lower altitudes, gentle slope and inclined land, and most in the shady slope and semi-suny slope. Elevation, slope gradient and slope aspect have significant influence on the distribution of grassland, woodland and construction land, but little influence on that of farmland and orchard. Based on the actual status of the distribution pattern of land use, suggestions about optimizing land use structure for the hilly region in the upper reaches of the Danjiang River are put forward. Though the terrain of hill top area is flat, but due to poor condition of water and sunlight, the cultivated land there should be returned to woodland or grassland in order to reduce the soil erosion; the slope farmland should be renovated and the ditches be controlled to protect the land; the distribution of the crops should be adjusted according to slope aspect and sunlight conditions. |
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