Landuse planning of dadghan watershed by Geographic Information system

In order to determine optimum landuses (in accordance with natural
capability) and improve the current land management, landuse
planning process was applied by USing GIS. Within the framework
of system analysis approach basic ecological and socio-economic
, data were mapped. The mapped data were digitized and imported to
Idrisi and Arc/Info to build a Database ,along with other descriptive
data. The process of geographic , coordinates registration, building
topology and editing the maps were done in Arc/Info. Then, in the
analysis stage, Digital Elevation Model (DEM) was prepared using
contour map in Idrisi. Based on that,slope, aspect and elevation
maps were produced . In the middle stage of the analysis,
environmental units map and unit attribute table were made by
overlaying slope, elevation,aspect soil and vegetation type and
denSity ltayers in arc/info.Then, environmental units attribute table
was 'completed by considering Other ecological and socio-economic
data in ArcView. Specific ecologica1 models were supplied for
dadghan basin and using Structured Query Language (SQL), each
of environmental units capability was determined and mapped for
allotted landuses. In the last analysis and-landuse planning process
stage, the priority of suitable landuses accordance with natural
capability) was detennined and mapped by cosidering landuse prerequisites
and using ,SQL. Finally, in order to predict institutional,
organizational and executive arrangements, criteria and regulations
of establishing optimum landuses were presented together with
buffers criteria and executive-organizational framework of basin
management plan.