Geomorphological Facies Zonation, Using GIS and RS and its Application in Natural Resources. (Case Study of Kouhdasht Watershed)

Document Type: Research and Full Length Article

Authors

1 Watershed Science and Engineering, Islamic Azad University, Science and Research Branch, Tehran,

2 Islamic Azad University of Khorramabad

Abstract

In recent years, the occurrence of water and wind erosion in
different parts of country due to the changes of land use from the forest and
pasture into the agricultural and also construction of communication lines
have increased. The study and research on this phenomenon, the effective
factors in creating them and also identification of geomorphology facies
types are necessary to prevent the waste of water and soil resources and their
damages. In this study, in order to homogenize the studies and prevent the
disperse works; we have tried to generate a base map based on
geomorphological one. Thematic maps such as lithology and slope erosion
facies map were also combined and finally obtained a homogeneous unit
map (work units) which has a special place in natural resources studies.
Considering the characteristics of each of these homogeneous units, there
should be a special planning to protect and restore them. Therefore,
considering the nature of this study, it can be a basic platform and be used in
other studies. According to researches, 12 geomorphological facies were
identified in the region. These facies are in mountain and pediment units; so
three types of pediments including erosion, appendage and covered ones
were distinguished in pediment unit. Different facies with specific
characteristics were determined in each of these types. Finally, considering
the natural power (potential) of facies and current status of land use, a
management program was suggested.

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