Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Pays Bas → 2010 → Development of stormwater management strategies in Tel Aviv, by application of city water balance model to describe material flows

UNESCO-IHE Institute for Water Education, Delft (2010)

Development of stormwater management strategies in Tel Aviv, by application of city water balance model to describe material flows

Ndetei, E.

Titre : Development of stormwater management strategies in Tel Aviv, by application of city water balance model to describe material flows

Auteur : Ndetei, E.

Université de soutenance : UNESCO-IHE Institute for Water Education, Delft

Grade : Master of Science (MS) 2010

Résumé partiel
Urban water systems in most cities are currently faced with pressures amongst them being water scarcity where demands from external water sources almost equal supply capacity. There is therefore a need to make more use of the total water resources available to urban areas. The alternative approach to the exploitation of these resources is the consideration of stormwater and wastewater as potential water resources, an idea that is being promoted by the emergent paradigm of integrated urban water management through the consideration of water supply, stormwater and wastewater concurrently as components of the total urban water cycle. This research is a build up on previous research work and aims to develop and measure by the use of sustainability indicators st rategies to turn the stormwater into a resource for Tel Aviv city. City Water Balance, a total water system model with a one day time step is used in Material Flow Analysis for the urban catchment of Tel Aviv. Stormwater flow rates and quality are determined from a representative sub catchment of Tel Aviv, at a selected location. These measurements are used to calibrate the model. For a storm event with total rainfall of 18mm and storm duration of 3 hrs the average discharge is measured as 4623 m3/day. Stormwater quality parameters analyzed included ; EC, major ions (NH4-N, NO3-N, Ca, Na, K, Cl, HCO3, SO4 and Mg) and trace elements (Pb, Cu, Al, PO4-P, Si, Fe and Ba). Pollutant loads werecalculated and the order for trace elements was as follows ; Si > Fe > Al > P > Pb > Ba > Cu. Further,parameters were assessed for general characteristics as well development of relationships between runoff and concentrations. For the majority of the stormwater samples the order of concentration of the major elements was as follows ; HCO3 > Cl > SO4 >NO3-N and Na > Ca > Mg > K (mg/l). From the pollutant and hydrograph, the peak of concentrations of some major ions as well as for some traces elements appeared to precede that of the flow rate ; first flush effects. The model predicted stormwater flow rates of 16 MCM/yr (for the whole city).

Sujets  : stormwater management water balance catchment areas urban water systems Israel

Présentation

Page publiée le 15 février 2020