Understanding of morphometric features for adequate water resource management in arid environments

Abstract

Abstract. Hydrological characteristics such as topographic parameters, drainage attributes, and land use/land cover patterns are essential to evaluate the water resource management of a watershed area. In the current study, delineation of a watershed and calculation of morphometric characteristics were undertaken using the ASTER global digital elevation model (GDEM). The drainage density of the basin was estimated to be very high, which indicates that the watershed possesses highly permeable soils and low to medium relief. The stream order of the area ranges from first to sixth order, showing a semi-dendritic and radial drainage pattern that indicates heterogeneity in textural characteristics, and it is influenced by structural characteristics in the study area. The bifurcation ratio (Rb) of the basin ranges from 2.0 to 4.42, and the mean bifurcation ratio is 3.84 in the entire study area, which signifies that the drainage pattern of the entire basin is controlled much more by the lithological and geological structure. The elongation ratio is 0.14, which indicates that the shape of the basin has a narrow and elongated shape. A land use/land cover map was generated by using a Landsat-8 image acquired on 10 August 2015 and classified to distinguish mainly the alluvial deposit from the mountainous rock.

Evaluation of Aloe Vera L. As Phytoremediator of Heavy Metals Contaminated Soils in Arid Environments

“…Saudi Arabia is located in a geographical area lacking fresh water and has no natural resources such as springs, rivers, and lakes with scarcity or lack of rainfall in some areas. Natural resources in the Kingdom are limited to some wells, rainwater pools, and floods that have not been sufficient to meet the essential needs (Elhag et al, 2017b).…”

Consideration of NDVI thematic changes in density analysis and floristic composition of Wadi Yalamlam, Saudi Arabia

“…Location of Wadi Yalamlam (Bahrawi et al, 2016). El-Kady et al, 1995;Shaltout and Mady, 1996;Shaltout et al, 1997). The flora of Saudi Arabia is reasonably well identified at the taxonomic level.…”

Consideration of NDVI Thematic Changes on Density Analysis and Floristic Composition of Wadi Yalamlam, Saudi Arabia

“…The height of these mountains reaches up to 2850 m. Some researchers have demonstrated that the topography and climate of the area are affecting the level of speciation (Abulfatih, 1992; . El-Kady et al, 1995;Shaltout and Mady, 1996;Shaltout et al, 1997). The flora of Saudi Arabia is reasonably well identified at the taxonomic level.…”