Identification of critical watershed at risk of soil erosion using morphometric and geographic information system analysis

Autor: Brahim Benzougagh, Sarita Gajbhiye Meshram, Abdallah Dridri, Larbi Boudad, Brahim Baamar, Driss Sadkaoui, Khaled Mohamed Khedher
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Applied Water Science, Vol 12, Iss 1, Pp 1-20 (2021)
Druh dokumentu: article
ISSN: 2190-5487
2190-5495
DOI: 10.1007/s13201-021-01532-z
Popis: Abstract Morphometric analysis is a pertinent scientific approach in any hydrological analysis, and it is necessary in the progress and management of drainage basin. Identification of areas at risk of erosion, and the prioritization of 48 sub-watersheds of Inaouene basin, was done by using linear, relief and areal aspects of watershed. The research carried out the use of geographic information system spatial data. The linear aspects include stream number, stream sequence, stream length, and bifurcation ratio, mean length of stream order, stream length ratio, mean stream length ratio, and form factor. The areal aspect includes frequency of stream, drainage density, texture ratio, channel length constant, and overland flow maintenance length. Ultimately, the relief dimensions included relief proportion, relief and ruggedness number. The array of compound (Cp) values computed allow us to set the priority ranks and classify the sub-watershed into three priority ranks groups: low, moderate, and high priority. Such morphometric analyses can be used therefore as a watershed erosion status estimator to prioritize land and water conservation initiatives and natural resources management.
Databáze: Directory of Open Access Journals
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