摘要：Taking Gongyi city as a study area and by using the ArcGIS software, this paper analyzed the characteristics of farmland landscape patterns at the five slope gradients by Digital Elevation Model （ DEM ） , and explored the human disturbance on farmlands. The results indicated that the distribution of farmland landscape elements differed obviously with slope gradients, the main farmland landscape elements was dryland and the irrigable land, and dryland inter-planted with fruit trees distributed in. The irrigable land distributed widely in the upland at <15°, the area of patches was large. The dryland had a relatively lower disturbance both in intensity and in frequency and lower utilization efficiency, which mainly distributed at 2°~15°. The effective area of patches of dryland inter-planted with fruit trees was low, and was gradually transformed into orchard. Those farmland landscape at 2°~6° and 6°~15° were the two major distributions of slope gradients, and were the key for realizing sustainable use of farmland. Human disturbance and dependence were lower at >15°, and the farmland landscape elements were gradually transformed into natural ecological elements, which would benefit the eco-environment of the study area.
关键词：Key Words: GIS; DEM; farmland landscape; slope; Gongyi city
