Results 11 to 20 of about 429,250 (301)

Criteria of quality and efficiency of water supply systems functioning [PDF]

open access: yesE3S Web of Conferences, 2023
The system of main criteria of quality and efficiency characterizing the operation of water supply systems (WSS) on the time interval [0,T] is considered.
Dyadun Sergey
doaj   +1 more source

The Need for Water Quality Criteria for Frogs [PDF]

open access: yesEnvironmental Health Perspectives, 1995
Amphibians are considered reliable indicators of environmental quality. In the western United States, a general decline of frog populations parallels an apparent worldwide decline. The factors thought to be contributing to declines in frog populations include habitat loss, introduction of exotic species, overexploitation, disease, climate change, and ...
R, Boyer, C E, Grue
openaire   +2 more sources

Acute Toxicity Assessment and Prediction Models of Four Heavy Metals

open access: yesToxics, 2023
Water quality criteria (WQC) are developed to protect aquatic organisms. Toxicity data of local fish are essential to improve the applicability of WQC derivatives.
Xin Zheng   +7 more
doaj   +1 more source

Cloud-Based Framework for Precision Agriculture: Optimizing Scarce Water Resources in Arid Environments amid Uncertainties

open access: yesAgronomy, 2023
In arid agriculture, the effective allocation of scarce water resources and the assessment of irrigation shortage risks are critical water management practices.
Fan Zhang   +5 more
doaj   +1 more source

Source apportionment of water pollutants in Poyang Lake Basin in China using absolute principal component score–multiple linear regression model combined with land-use parameters

open access: yesFrontiers in Environmental Science, 2022
Source apportionment of surface water is essential for effective pollution control and sustainable water management. Physical mechanism models usually need so much data and parameters for calibration that their application for complex hydrologic ...
Xikang Hou   +16 more
doaj   +1 more source

WATER QUALITY INDICES IN MÉXICO AND COLOMBIA. EVOLUTION, CRITERIA AND CHALLENGES

open access: yesIngeniería Investigación y Desarrollo, 2022
The Water Quality Index (WQI) is a simple and easy-to-understand tool for analyzing and reporting quality trends. Water quality is not static and depends on multiple factors, in this sense; globally various indices have been developed based on local ...
Ana Patricia Gaytán-Alarcón   +4 more
doaj   +1 more source

Setting water quality criteria for agricultural water reuse purposes

open access: yesJournal of Water Reuse and Desalination, 2017
The use of reclaimed water for agricultural irrigation is practiced worldwide and will increase in the future. The definition of water quality limits is a useful instrument for the assessment of water quality regarding its suitability for irrigation ...
K. Müller, P. Cornel
doaj   +1 more source

Nitrogen and Phosphorus Concentration Thresholds toward Establishing Water Quality Criteria for Pennsylvania, USA

open access: yes, 2020
Nutrient enrichment is currently a leading cause of impairment to streams in Pennsylvania. Evaluating the water quality condition and eutrophic status of streams and rivers is a challenge without established thresholds for nutrient concentrations, which ...
John W. Clune   +2 more
core   +1 more source

Selection of suitable aggregation function for estimation of water quality index for the Orontes River

open access: yesEcological Indicators, 2022
This study aims to select the most appropriate aggregation function to determine a preliminary classification of water quality according to special criteria for required use.
Lina Khouri, Mhd Bashar Al-Moufti
doaj   +1 more source

Environmental health in slum communities : analysis of household water quality in four slum communities in the City of Bhuj, India [PDF]

open access: yes, 2008
The main focus of this study is on water quality in four slum communities in the City of Bhuj, India. In order to determine key variables affecting water quality in surveyed households, the interrelation between household water quality, environmental ...
Wieland, Fiona, F. Wieland
core   +1 more source

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