314 
2.2 Through spatial analysis on basin’s important 
geographical elements, distill verity and relationship which 
impliedly in the spatial data, offer references to assistant 
decision-making. 
Figure 2 flowing figure of spatial analysis process 
3. STATISTICS ON DRAINAGE BASIN’S IMPORT 
GEOGRAPHICAL ELEMENTS 
This segment mainly consider on following facets: basin’s 
terrain analysis, statistic analysis of basin’s resident, highway 
and river. 
3.1 basin’s terrain analysis 
Terrain indexes are the essential physical geography elements, 
as well as the important nature elements influence human 
beings’ production and living condition. Distilling of the terrain 
indexes would take important role in water and soil erosion, 
soil utilization, soil evaluation, urban planning and etc facets. 
Distill slope, aspect, plan curvature, profile curvature, SOS, 
SOA, hypsography extent, coarseness extent, donga density 
and etc indexes, analyze the terrain information through the 
above indexes. 
Generally speaking, slope, aspect, plan curvature and profile 
curvature could distill directness, while other indexes need 
complex Calculation. 
3.2 Statistic of residential data 
Analyze spatial distribution pattern of the different kinds of 
residential points, calculate distribution index R using the 
nearest index method, R=Dobs/Dran, in the expression, Dobs 
represent the average value of each mode to its nearest node, 
Dran represent the average distances of the random residential 
points. Whereafter, confirm distribution pattern through R 
value. 
Analyze the disperse extent of residential points, grouping 
these point following the distance which the fix center to each 
points, statistic the frequency, draw the cumulate frequency 
curve. 
Calculate the residential density which in and out the drainage 
basin, sequentially, contrast and analyze the integrated 
influence of the basin’s significance to the region. 
3.3 Statistic of highway data 
Calculate highway curvature, 
W curvature = highway route length/beeline distance of 
jumping-off point to end-point 
Calculate highway density: 
e = E li/ A, in the expression, A represent region area. 
Calculate highway integrality coefficient: 
o = f / e2„ in the expression, f represent route frequency, f = n 
/ A, n represent route numbers, A represent region area. 
Calculate each crunodes’ adjacence extent, available arriving 
possibility and minimum distance in the traffic net, analyze and 
evaluate region traffic layout. 
3.4 statistic of stream data 
Through calculate of the river’s curvature, analysis river 
develop phase. 
Wcurvature =river route length/beeline distance of jumping-off 
point to end-point. 
Build none- billabong DEM, calculate conflux accumulation, 
stream length, generate river net. 
Research on geologic conformation base on river net 
ichnography. Through the river net graphic, research on 
hydrography, stream graphics or relief map, we can gained 
topical river net characteristics, furthermore, we can confer the 
geological conformation of the deserved zone. 
4 Research and analysis on the spatial distribution 
disciplinarians of drainage basin’ s important geographical 
elements 
Progress spatial analysis of basin’s important geographical 
elements base on the statistics result, consider on spatial 
classification analysis, buffer analysis, overlay analysis, 
network analysis and etc facets. 
4.1 About classification analysis on the distribution of 
basin’s important geographical elements, we mainly consider 
following facets: altitude, terrain characteristics and gradient 
ingredients. 
This paper analysis altitude classification according to 
clustering theory, namely, as the classification series has fixed, 
shall analogical data as the same series, whereas, share the 
different series. This method may keeping data’s statistics 
characteristics preferable; 
This paper analysis terrain characteristics classification 
according to China’s mountain and knap rank partition system;