Surface Water Quality Of River Research Articles

Evaluation of Spatial and Seasonal Variations of Dissolved Organic Matter in Maliau Basin, Sabah, Malaysia

The characteristics dissolved organic matter (DOM) and surface water quality in Maliau Basin, Sabah, Malaysia, were determined from December 2014 to September 2015. The objectives of this study were: (i). to distinguish the surface water quality of rivers which consisted of different types of land use: primary forest (PF), secondary forest (SF), main river (MR) and altered habitat (AH); (ii). to assess seasonal variations of the water quality. A total of 36 water samples were collected during the fieldwork campaign that extended over high and low rainfall periods. The water quality physico-chemical parameters such as water temperature, pH, dissolved oxygen (DO), conductivity, and salinity were measured in-situ with the YSI-multiparameter instrument, while dissolved organic carbon (DOC) concentration was evaluated using Shimadzu TOC-V-SCH analyzer with auto-sampler TOC-ASI-V equipped. Dissolved organic matter (DOM) was determined optically in the laboratory at 254 (a254), 340 (a340) and 410 (a410). Discriminant analysis (DA) was employed to organize independent variables into mutually-exclusive groups. The outcome of DA indicated that water temperature, total suspended solid (TSS), and conductivity were dominant at AH, whilst a340 was dominant at MR in March 2015. Our results also showed seasonal variations for water quality parameters. The highest mean concentrations of pH and a340 were found during the dry period (March 2015) and dissolved oxygen (DO) during the wet season (December 2014), suggesting spatio-seasonal variations of DOM and water quality parameters were determined by environmental factors such as precipitation, water velocity and discharge amount. UV-vis absorptions a254 and a340 show significant positive correlation with dissolved organic carbon (DOC), suggesting that it could be a suitable proxy for DOC concentration for tropical flowing water.

Metal pollution status of Tajan River – Northern Iran

ABSTRACTThe monitoring of surface water quality of rivers is crucial to protect aquatic life and receiving water bodies of economic importance. The aim of the current study was to examine selected physicochemical parameters of River Tajan due to its ecological importance in Iran. Water samples from nine points covering the entire Tajan River and Caspian Sea estuary were collected and analyzed for pH, electrical conductivity (EC), total dissolved solids (TDS), carbonates, chlorides and selected heavy metals including zinc, cadmium, lead and chromium. The pH and levels of EC, TDS, chlorides, carbonates and all metals were within the USEPA reference guidelines for surface water quality standards. Although these water quality parameters are considered safe, continuous monitoring and assessment is recommended in order to protect the coastal receiving waters of Caspian Sea which serves as a tourist attraction in northern Iran.

Integrating Land Use and Water Quality for Environmental based Land Use Planning for U-tapao River Basin, Thailand

Abstract Land use changes are the results of complex interactions such as policy, management, economics, culture, human behavior, and environment. The purpose of this study was to examine the impact of land use changes on surface water quality of river. This study integrated a decade of available land use and water quality data to examine relationships between land use changes and surface water quality. Both cross-sectional and longitudinal studies were conducted to evaluate the impact of land use on water quality of river. The study noted significant relationship between water quality and land use and the abilities of land use indication to explain water quality. Urban and agriculture land uses had strong positive relationship with concentrations of water pollutants. Forest land use had positive relationship with water quality. The results identified the clear relationship between land use and the water quality indicators which can be used in environmental protection and land use planning. The findings of this study will be useful for policy makers, planners, and researchers to unveil the pollution, to adapt environmental and land use polices for sustainable development of river basin.

Pollution loads and surface water quality in the Kızılırmak Basin, Turkey

Abstract A detailed study on the calculation of pollution loads and surface water quality classification was one of the most important outputs of the project on the preparation of watershed protection plans for the Kizilirmak Basin. For this purpose, the pollution loads for chemical oxygen demand (COD), total suspended solids, total nitrogen, and total phosphorus (TP) were calculated. The water quality classes of surface waters were determined based on Turkish regulations using the data obtained by the State Hydraulic Works between the years 2003 and 2009. The pollution loads and the surface water quality of rivers were displayed as maps using the geographic information systems. The connection between point and non-point pollution sources and water quality was examined. According to the obtained data, the main factors, which lead to environmental pressure on the surface waters in the Kizilirmak Basin, are non-point-source pollution originating from widespread agriculture and livestock breeding, solid wast...