The present study proposes a regional and more appropriate variable group for the definition of a Water Quality Index for the Brazilian Federal District, based on water quality monitoring of surface waters in the region. The monitoring was carried out monthly between August 2016 ...
Groundwater quality appraisal using water quality indices (WQIs) is essential for managing water quality [1,2,3,4,5,6]. The use of WQIs for appraisal of groundwater aptness for drinking and industrial uses in developing countries is required. There is an unprecedented increase in anthropogenic...
were developed in many countries, such as: for river pollution evaluation39,40,41,42; for public water supplier43; for river water quality status definition44,45and others, such us, the Florida stream water quality index—SAFE46, the Lower Great Miami watershed enhancement program—...
This paper tries to establish a scientific, complete and effective evaluation index system, which will help to achieve the comprehensiveness of the evaluation index and make the definition of the evaluation results clearer and more accurate through the continuous in-depth research conducted by future ...
(2017) exemplify this approach; they establish a function relationship between expenditures on treatment chemicals and changes in source water quality. Many studies (n = 8) use a broader definition of costs that includes expenditures for multiple inputs into the treatment process (e.g., ...
Each metric is clearly defined, with units, definition, assessment rule and specification of the input variables. Taking these objectives into account, a SWOT analysis was carried out (Table 3). Objectives and criteria Metrics 1. Adequacy of the service provided 1.1 Service ...
water quality evaluation.Taking DO,CODMn,COD,NH3-N,TP,Petroleum as the evaluation factors,the BP neural network was established to evaluate the water quality for Yishui River.The paper analysed water quality of four sections in Yishui River and compared with the results of singe index ...
This work delves into the crucial role of service quality in the water supply and sanitation sector. Despite extensive research and implementation of quality management practices in this sector, a universally accepted definition of quality is still lacking, resulting in various service quality assessment...
on integer derivatives39,40. The most frequently used definitions are the following: Grunwald - Letnikov (G-L), Riemann - Liouville (R-L), and Caputo41. As it is less complex than the others, the G-L definition was employed in this study. Grunwald - Liouville is defined as follows42:...
et al. Anthropogenic drought: definition, challenges, and opportunities. Rev. Geophys. 59, e2019RG000683 (2021). Article ADS Google Scholar Mehta, L. The manufacture of popular perceptions of scarcity: dams and water-related narratives in Gujarat, India. World Dev. 29, 2025–2041 (2001). ...