background: this study investigated the interaction between heterotrophic bacteria and coliform, fecal coliforms, fecal streptococci bacteria in water supply networks. methods: this study was conducted during 2013 on water supply distribution network in aq qala city, golestan province, northern iran and standard methods were applied for microbiological analysis. the surface method was applied t...

At the World Summit on Sustainable Development (WSSD) in Johannesburg in 2002, the international community agreed to a target to halve the proportion of people who lack access to basic sanitation by 2015. Available information paints a grim picture of the water and sanitation conditions in much of the developing countries. The great majority of these people live in Asia and Africa. Over one-hal...

An international partnership to help the poor gain sustained access to improved water supply and sanitation services A study in community-managed water supply projects in 15 countries

measuring sensitivity of hydraulic structures is considered as an approach for evaluation of water projects performance, due to lower distribution efficiency in irrigation and drainage project schemes. sensitivity analysis approach for irrigation structures is one of flow analysis methods which are developed in recent years in order to measure the behavior of flow in hydraulic structures in an ...

Economic valuation of water is useful in the administration and management of water. Population growth and urbanization caused municipal water demand increase in Iran. Limited water resource supply and urban water network capacity raised complexity in water resources management. Present condition suggests using economic value of water as a criterion for allocating policies and feasibility study...