Drainage models: An evaluation of their applicability for the design of drainage systems in arid regions

Only 5%–10% of irrigated lands in least developed countries (LDCs) are currently drained. Although drainage simulation models (DSMs) used to evaluate alternative designs, it is unclear which model suitable for LDCs' arid and semi-arid regions. This study evaluates selected DSMs (ADAPT, RZWQM2, DRAINMOD, EPIC, HYDRUS-1D, WaSim SWAP) critically assesses their applicability areas. Also, establish apply selection criteria based on the availability data LDCs with Libya as a case study, identify most application Libya. DRAINMOD had highest overall score, methods predict missing input parameters discussed. Evaluating feasibility using predicted design systems would help farmers, planners decision-makers reduce cost system and, also, make more accessible tool different designs.