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Islamic University – Gaza (2015)

Morphometric Characteristics Of Al-Hasa Wadi Using GIS A Study In Applied Geomorphology

المغاري, باسم عبد الرحمن خليل

Titre : Morphometric Characteristics Of Al-Hasa Wadi Using GIS A Study In Applied Geomorphology

Auteur : المغاري, باسم عبد الرحمن خليل

Université de soutenance : Islamic University – Gaza

Grade : Master 2015

Résumé
This study investigated the areal, shape and relief morphometric characteristics of Al-Hasa Wadi basin and it is sub-basins using GIS in addition to analysing the basin drainage network. The study depends on the analyses of the Digital Elevation Model of the Basin area taken from ASTER Satellite with a resolution of 30 metre. The study aimed at deriving out the basin and the river network from DEM layer using the GIS program and then building morphometric characteristic database for the basin and its sub-basins, then they analyzed to deduce their geomorphological implications and extract a particular set of maps for the basin according to the inferred Digital database. The study reveals that the basin is small, located in the southern Palestinian center with an area of 728.7km2 and 54.4km long. Its perimeter is long i.e. 212.2km2 in comparison with its area. Its morphometric characteristics are varied as a result of the climate, geology, surface and soils differences and still in its early mature geomorphological cycle. The longevity was 0.56, circularity 0.2, shape 0.25 and compactness 2.24, which means that it tends to elongation more than circularity and irregular in its general form. The study of the relief aspects shows that the Basin relief value is high reached 16.5m/km and the Basin is in the early mature stage as the hypsometric integration value is 51.74%. The study of the river networks reveals that the basin consists of 390 tributaries founded in 6 orders and conform with Horton 1945 laws in the area and lengths, with a reduction of discharge density 1.003km/km2 and river frequency 0.54 stream/km2. The result of Principle Component Analysis of 24 morphmetrical variables shows that they are summarized into 5 components explained 90.6% from the whole variables variances. It turns out from Cluster Analysis that the basins classified into 6 groups, the first cluster alone contains 41% of the all Basins. The study recommended the necessity of using GIS in geomorphological studies in general and in studying the river basins in particular. However, the study recommended a morphometric comparative studies of the river basins in Palestine to fully understand their aspects. The Palestine government should provide appropriate facilities of maps, modern Satellite images, so it enables the Wadi competents to study them much better.

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Page publiée le 4 décembre 2019