Open AccessUse of modelling for the renovation of drainage channels – The case of the Bouteldja plain in northeastern Algeria
Author(s) -
Foued Sennaoui,
Tamara Benabdesselam,
Abdallah Saihia
Publication year - 2019
Publication title -
journal of water and land development
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 16
eISSN - 2083-4535
pISSN - 1429-7426
DOI - 10.2478/jwld-2019-0057
Subject(s) - drainage , hydrology (agriculture) , agriculture , sedimentation , channel (broadcasting) , wetland , period (music) , environmental science , geology , geography , engineering , geotechnical engineering , geomorphology , ecology , archaeology , sediment , electrical engineering , biology , physics , acoustics
Agricultural drainage has become a priority in agriculture and the economic development of the state. Algeria has launched several agro-economic projects pertaining to natural resources and human potential for development in agricultural areas. Our aim is to model the morphological evolution of open drainage channels, under the influence of sedimentary transport processes. The application of the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) software is to examine two-phase mathematical models. In our case it is the flow and the sedimentary charge along a trapezoidal earth channel of a wetland north east of Algeria. The results of these models were validated by actual data obtained during the observation period from 2017 to 2018, for various rainy events. The solid transport and sedimentation velocity equations of Engelund and Hansen and Van Rijn respectively used by this model, give Nash performance criteria equal to 0.95 and determination coefficient R 2 equal to 0.91. On the other hand, the laying of a coarse gravel layer of median diameter of the grains d 50% = 60 mm on the bottom of the channels reduces the rate of sedimentation by about 32% over an 11-year period. This satisfying objective study of the modelling allows to obtain an approach to the renovation and a plan for new design of drainage systems, that participates to the sustainable development in the agricultural field.