rivers and streams are one of the most important water resources. rivers water quality depends on various conditions such as hydrological, physicochemical and biological processes.water resources have significant impact on social, economical and political developments. the zyarat watershed which is the main source of surface water to supply water for city of gorgan and surrounding areas has bee...

Colombo is a city surrounded by a large and interconnected system of natural wetlands. These wetlands which have historically provided a range of water services to the city are now believed to be threatened by degradation due to the recent changes in the urbanization patterns and urban lifestyle in Colombo. This paper presents a study on the current state and recent trends in surface water qual...

in many urban areas, groundwater has been exploited neglecting to wet and dry periods owing to of surface water deficit. in this study, using the percent of normal rainfall index, 36 year (1971-2008) were studied and a drought event and a wet event were determined. the reason to choose two consecutive years is the effect of early wet period on groundwater quality. physicochemical characteristic...

Water quality has deteriorated in recent years as a result of rising population and unplanned development, impacting ecosystem health. The water parameters Qaroun Lake are contaminated to varying degrees, particularly for aquatic life consumption. For that, the objective this work is improve assessments surface determine different geo-environmental affecting lake environmental system utilizing ...

Recent urban development in Shanghai, the largest city in China, and its impact on the water environment are examined in this study. The area of built-up surface was obtained from the classification of the Landsat 7 ETM+ images of the year 2000 for Shanghai. The proportion of built-up surface and population density were extracted from buffer zones with radii ranging from 100 to 2000 m, and used...

Water quality along the Waratah Rivulet in the Woronora Lake Catchment, New South Wales (NSW), Australia, has been monitored during the last three years by the Sydney Catchment Authority. Water quality data shows changes in chemical composition due to cracking of streambeds and rockbars, and diversion of surface water into subsurface routes in the Hawkesbury Sandstone aquifer. Water quality ups...

Suarez, D.L., 1989. Impact of agricultural practices on groundwater salinity. Agric. Ecosystems Environ., 26: 215-227. The impact of agricultural practices on water quality has been examined predominantly with an emphasis on surface water. Impacts on groundwater, as compared with surface waters, are much more difficult to quantify. This is due to larger travel times to and in groundwaters as co...