وادي المشقر في المجمعة: دراسة مورفومترية بإستخدام نموذج الارتفاعات الرقمي

الملخص EN

Morphometric analysis plays a major role in assessment of rivers and dry basins.

this study aims to determine the morphometric variables of the Wadi al-Mashqar basin, which is one of the most important wadies in the Arriyadh region.

the wadi outlet crosses through al-Majma’ah city and confluences with the al-Kalbi Wadi, which adds to the importance of the study, as over the last decades, al-Majma’ah city has witnessed various flooding events.

DEM was used as the main source data to extract morphometric characteristics.

GIS was used as a tool to analyze the factors.

Wadi al-Mashqar ranks a five, according to Strahler stream order, with a total of 425 streams and total length of 627 km.

The results indicate that the limited impact of torrential rain on the urban area in al-Majma’ah city is due to the low drainage density, which averages 1.2 km/km2, as this leads to a slow impact of torrents.