Studies of the Implementation of Tehran Stormwater Management Master Plan and Minor Drainage System Improvement in ... Project name: Studies of the Implementation of Tehran Stormwater Management Master Plan and Minor Drainage System Improvement in Region 1 of Tehran Municipality Status Completed Registration Date 2019/11/25 Update Date 2021/02/27 Manager Region 1 Tehran Municipality Goals 1st and 2nd Phase studies of the drainage system; Hydraulic improvement of the drainage system model, locating and preparing repair and maintenance plans; Updating the GIS data bank; Schedule 1st and 2nd Phase Studies Executive Actions Survey and identification of 525.7 km of storm water drainage network. Survey and identification of 29.7 km of storm water drainage main network. Survey and identification of 496 km of storm water drainage subnetwork and discovering current network problems; Pin-pointing 86 flood points across the area, specifying the reasons, and proposing solutions; Modeling the current storm water drainage network and specifying channels with inadequate throughput capacity that require modification (52 km); Outlining the suitable storm water drainage network; Geography Location Municipal Region 1, Tehran, Iran