Estimating averages and detecting trends in water quality data
نویسنده
چکیده
The estimation of temporal averages and trends are significant elements of elaborating water qualitymanagement strategies. This paper reviews some relativelysimple statistical techniques in the context of shallow lake eutrophication control. The techniques are illustrated by analyzing measurement data from the Lake Balaton region of Hungary.
منابع مشابه
Variations of water quality in the monitoring network of a tropical river
Rapid development and population growth have resulted in an ever-increasing level of water pollution in Malaysia. Therefore, this study was conducted to assess water quality of Selangor River in Malaysia. The data collected under the river water quality monitoring program by the Department of environment from 2005 to 2015 were used for statistical analyses. The local water quality indices were ...
متن کاملAssessment of drought and landuse changes: Impacts on groundwater quality in Shabestar basin, North of Lake Urmia
Management of groundwater quality is very important in arid and semi-arid areas. In this study, satellite images from TM, ETM and OLI sensors were used to evaluate the impacts of land use changes on groundwater quality for 1990, 2007 and 2015 in Shabestar basin. After processing and analyzing images, the basin was classified into five land use classes including pasture, bare land, farming, gard...
متن کاملEvaluation of trends for iron and manganese concentrations in wells, reservoirs, and water distribution networks, Qom city, Iran
Background: This study aimed to evaluated trends for iron and manganese concentrations in wells, reservoirs, and water distribution networks in Qom city during the summer of 2012. Methods: This was a cross-sectional study. The studied scopes consisted of groundwater (60 wells), reservoirs (10 tanks), and water distribution network (33 points). One sample was taken from each source monthly. Stat...
متن کاملModeling of vegetation index and land surface temperature to identify and compare the changing trends, using generalized estimating equations
Normalized difference vegetation index and land surface temperature data, in a sample plot each from east, center and west of Nepal, from 2000 to 2015, were analyzed to identify and compare the trends of vegetation and temperature changes during the period. The data were obtained from moderate resolutions imaging spectro-radiometer. Normalized difference vegetation index charactiszes a resoluti...
متن کاملEvaporative isotope enrichment as a constraint on reach water balance along a dryland river.
Deuterium and oxygen-18 enrichment in river water during its transit across dryland region is found to occur systematically along evaporation lines with slopes of close to 4 in (2)H-(18)O space, largely consistent with trends predicted by the Craig-Gordon model for an open-water dominated evaporating system. This, in combination with reach balance assessments and derived runoff ratios, strongly...
متن کامل