COUPLING OF THE SPATIAL PATTERN OF LOCAL RIVER SYSTEMS AND THE LANDFORM MORPHOLOGICAL FACTORS IN HILLY AREA OF SICHUAN BASIN

Based on the ArcGIS software,taking the Shimen river system and Wuyi river system in Bashan Town of Zhong County,Chongqing as the study area,this paper analyzed the coupling relationship of the spatial pattern of local river systems and the landform morphological factors.The results showed that:(1)The spatial pattern of local streams were significantly affected by the rock stratigraphies.The higher grade waterways tended to be distributed in the stratigraphies with lower elevation.(2)The spatial pattern of local river systems were highly correlated with elevation,slope,the relief degree of land surface,the surface roughness and the surface cutting depth.There was a more apparent coupling relationship of the spatial pattern of local streams and the landform morphological factors in more developed river system,which led a more similar change on spatial pattern distribution in different level waterways.(3)While the Wuyi river system held 1.05 as the fractal dimension value,1.00 was Shimen river system's.Both of them were in primary developing stage and Wuyi river system was located in a more broken surface area.Therefore,the value of the fractal dimension could be applied to judge the erosion development stage of the local geomorphology.