The Impacts of Land-Use Change on the Runoff Characteristics Using HEC-HMS Model

EasyChair Preprint no. 2204

Abstract

Runoff is affected by several parameters such as climatology, soil type, and Land-use/cover, which includes vegetation cover and level of urbanization. The current study assesses the impact of Land-use/cover change between 1994 and 2018, on the runoff characteristics of Wadi Al-Mulaikhy Sub-watershed in the Sana'a basin, Yemen by integrated GIS, HEC-GeoHMS extension, and HEC-HMS model. Remote Sensing data, land-use/cover, soil type, and rainfall are the main input data were 3used. The study results showed that the agricultural area was reduced by 5.67%. Conversely the surface runoff and the maximum (peak) value of runoff for the overall study area have been increased by 1.65% and 1.27% respectively. It was found that there is no significant change in runoff volume relative to Land-use/cover change due to some agricultural general class changes to other classes (shrubs/brush), which has similar runoff characteristics, while the second change, agricultural general class changes to urban classes (high urban density, medium to low urban density and roads) which occurred north of the study area at the boundary of the city of Sana'a which has an urban expansion The changes in runoff parameters were found in the sub basin (W300, W310 and W320) which located in the north of the study area due to the changes of agricultural general class changes to urban classes (urban high density, urban medium to low density and roads).

Keyphrases: Agriculture, GIS, HEC-HMS, land use/cover, remote sensing, Runoff, Sanaa basin, Yemen

@Booklet{EasyChair:2204,
  author = {Ibrahim Al-Samawi and Abdullah Noman and Khaled Khanbari and Hadi Quriaa and Nabil Al-Areeq and Mastor Alqaish and Musaed Aklan},
  title = {The Impacts of Land-Use Change on the Runoff Characteristics Using HEC-HMS Model},
  howpublished = {EasyChair Preprint no. 2204},

  year = {EasyChair, 2019}}