Flood generation became a common incident in Mekelle because of low vegetation cover and the vastlyrnspreading land cover that accompanies development also results in less water being available forrninfiltration into the ground. Moreover, the increasingly constructing impervious structures facilitaternmore flood to be produce and overloading the conventional system of drainage in the city. Therefore,rnthe existing flooding impacts on the conventional system studied and parameterized with help ofrnGeographical information system (GIS) application.rnrnThe paper also presents a diverse stormwater management technique that potentially could bernimplement in a case study area and evaluate their sustainability using Analytical Hierarchy Processrn(AHP) decision support tool. Five alternatives for stormwater management in the selected siternevaluated according to 4 main criteria and 11 sub criteria using an Analytical Hierarchy Processrntype called MCDA model. The model, which applies quantitative scoring and experts invited tornconduct the scoring and weighting elements of the method. Again, SWMM tool is applied torncompute the rainfall-runoff simulations with in Subcatchments located in the city of Mekellern(Northern Ethiopia).Finally, comparisons takes place between different Hydrologic and hydraulicrnparameters produced by a design storm before and after installing SWMM-LID controlrncomponents.rnrnThe result showed that the best sustainable stormwater management solution after analysis of thernMulti Criteria Analysis weightage tends to Rain garden (A2), and infiltration trench (A3) withrnoverall aggregate weight of 0.489 and 0.232 respectively which employs main criteria such asrntechnical, Environmental impact, social impact, and economic impact. Following weightage forrnthe best management types a moderate-weight to Bio-cells (A1) scoring 0.190, 0.18 to Vegetationrnswale (A5) and finally lowest priority of 0.166 to Permeable pavement (A4). With installing ofrnLID-controls that displace equal amount of area covered by impermeable ground, runoff onrnaffected Subcatchments S80 & S81, high imperviousness, with initial flow rates of 3.16mrn3rn/s and rn3rn3.34 mrn/s respectively reduced and controlled. As recommendation, some relevant LID-rncomponents are allocated considering the suitability criteria of construction of different site inrnMekelle city.