water model Articles
-
Seasonal influence of environmental variables and artificial aeration on Escherichia coli in small urban lakes
This study investigated patterns of Escherichia coli in urban lakes in Lubbock, Texas. Specific objectives were to (1) document seasonal patterns in abundance of E. coli over a 3-year period, (2) identify environmental factors, including effects of migratory geese and artificial aeration devices that may influence E. coli abundance, and (3) determine if E. coli abundance over time was similar ...
-
Analysis of domestic water demand variables of a residential colony in Ajmer, Rajasthan (India)
In this paper, significant variables of domestic urban water demand required for the purpose of estimation of urban water supply in five planned colonies of the City of Ajmer, Rajasthan, India, are identified. The data for these 16 variables are entered in the multiple linear regression (MLR) (stepwise) models in SPSS software, and domestic water demand models are developed. Based on these ...
-
Water and the city: exploring links between urban growth and water demand management
Urban water management is currently understood as a socio-technical problem, including both technologies and engineering interventions as well as socioeconomic dimensions and contexts vis-à-vis both end users and institutions. In this framework, perhaps the most important driver of urban water demand, at the intersection between engineering, social and economic domains, is urban growth. ...
-
A grey-encoded hybrid accelerating genetic algorithm for parameter optimisation of environmental models
A new method, grey-encoded hybrid accelerating genetic algorithm, is presented for the parameter optimisation of environmental models. With the shrinking of searching range, the method gradually directs to optimal result with the excellent individuals obtained by grey genetic algorithm embedding Nelder-Mead simplex searching operator. The convergence theorem is given for guaranteeing the global ...
-
Water Resources Management and Modeling
Hydrology is the science that deals with the processes governing the depletion and replenishment of water resources of the earth's land areas. The purpose of this book is to put together recent developments on hydrology and water resources engineering. First section covers surface water modeling and second section deals with groundwater modeling. The aim of this book is to focus attention on the ...
-
Optimisation of water treatment works performance using genetic algorithms
Verified static and dynamic models of an operational works were used alongside Monte-Carlo conditions and non-dominated sorting genetic algorithm II (NGSAII) to optimise operational regimes. Static models were found to be more suitable for whole water treatment works optimisation modelling and offered the additional advantage of reduced computational burden. Static models were shown to ...
-
Methodology for Optimal NRW Program Design
During 2009-2010, RTI International developed and published a financial model which calculates the financially optimum level of Non-Revenue Water (NRW). The model computes a steady-state target for NRW reduction and control programs, based on site conditions and local costs. The model was presented at IWA Water Loss Specialist Conferences in Cape Town and Sao Paulo and other international ...
-
Estimating regional water demand in Seoul, South Korea, using principal component and cluster analysis
ABSTRACTIn Seoul, the multiple regression models were used to estimate future water demand and to verify the ability of the water supply to cope with regional development. A regional development project extending over two districts was planned to stimulate the regional economy of Seoul in October 2003, and multiple regression models for each district were developed to verify the capacity of water ...
-
The B O B E R (Better Observation for Better Environmental Response) Project - Slovenia
The B O B E R (Better Observation for Better Environmental Response - Boljše Opazovanje za Boljše Ekološke Rešitve) Project, Slovenia The BOBER project was completed in 2015 and it is the largest project for monitoring the environment conditions across Slovenia. The project goals were to upgrade the national system for monitoring and analysing the state of the water ...
-
Prediction of biochemical oxygen demand at the upstream catchment of a reservoir using adaptive neuro fuzzy inference system
The aim of this study is to examine the potential of adaptive neuro fuzzy inference system (ANFIS) to estimate biochemical oxygen demand (BOD). To illustrate the applicability of ANFIS method, the upstream catchment of Feitsui Reservoir in Taiwan is chosen as the case study area. The appropriate input variables used to develop the ANFIS models are determined based on the t-test. The results ...
-
The application of a drought reconstruction in water resource management
This study uses extended (1880s–2012) rainfall series to examine the implications of historical droughts on water supply yield calculations used in water resource management and drought planning across the English Midlands and Central Wales. UK guidance to water companies is to use climate data from the 1920s to present where possible in modelling to inform water resource management and ...
-
Effluent carbonaceous biochemical oxygen demand (CBOD) characterization for modern pulp and paper facilities
As receiving water quality models are being used to address dissolved oxygen issues requiring an increased degree of resolution, a more refined characterization of effluent CBOD can become an important aspect of the analysis. The selection and use of kinetic models to identify effluent specific parameters can have a significant impact on this characterization. This study modeled effluents from ...
-
Assessment of water quality modelling capabilities of EPANET multiple species and pressure-dependent extension models
The need for accurately predicting water quality through models has increasingly been crucial in meeting rigorous standards and customer expectations. There are several endeavours on developing robust water quality models for water distribution systems. In this paper, two variants of the EPANET 2 water quality model have been assessed to inform future research. The models are the multiple ...
-
Project - Swimming Pool
One of the most appreciated applications of Sferasol is in combination with swimming pools, for water temperature maintenance. In these cases we use the model without water tank SF-A. The sphere is directly connected with the pool heat exchanger, through an external pumping system. The advantage of this solution is the simple network scheme and the aesthetical impact, where you can avoid flat ...
-
Multivariate statistical analysis for water demand modelling: implementation, performance analysis, and comparison with the PRP model
Water demand is the driving force behind hydraulic dynamics in water distribution systems. Consequently, it is crucial to accurately estimate the actual water use to develop reliable simulation models. In this study, copula-based multivariate analysis was proposed and used for demand prediction for a given return period. The analysis was applied to water consumption data collected in the ...
-
Validation of a mesoscale hydrological model in a small-scale forested catchment
The aim of this study was to examine the abilities of the mesoscale ecohydrological model Soil And Water Integrated Model (SWIM) to simulate discharge, soil moisture, and groundwater dynamics in a small-scale forested catchment. Moreover, the influence of two lateral flow computation techniques on the simulation efficiency was assessed. Generally, the discharges were simulated poorly. ...
-
Project - Peel Region Water Resources Management Model 2019
Client: Public Works, Region of Peel, T. Estephan, (905-791-7800 ext. 4339) Infrastructure Planning and Studies-Growth, Groundwater and Source Water Protection, 10 Peel Centre Drive, Brampton, ON L6T 4B9 In March, 2019 Earthfx was contracted by the Region of Peel to develop a fully integrated GSFLOW surface water/groundwater model of the entire region. This project, referred to as the ...
-
Quantifying the differential contributions of deep groundwater to streamflow in nested basins, using both water quality characteristics and water balance
This paper describes use of a hydro-chemical mixing model and a water budget to investigate the presence of deep runoff pathways in two small, nested sub-catchments of the Eden basin, UK (8.8 km2 Blind Beck and 1.0 km2 Low Hall stream). A linear relationship between bicarbonate concentration and electrical conductivity was used in a two-component mixing model. End-members were identified as a ...
-
The customer forum – putting customers at the centre of regulating water services
This article will explore recent initiatives in customer engagement in water services in Scotland, UK. Scotland has a well-established and successful model for water services regulation and governance, with a public supplier performing as efficiently as the top quartile of private English companies. One recent innovation has been a form of negotiated settlement between the provider and a ...
-
Risk analysis of pesticides applied to rice paddies using RICEWQ 1.6.2v and RIVWQ 2.02
Rice is commonly cultivated in Southern Europe in large river basins where the extensive use of herbicides may impactwater quality at basin scale level. Consequently, pesticide risk assessmentwould be more relevant when considering a rice cultivation area as awhole. Accordingly, two watershed-scale scenarios were developed to represent the specific agronomic, water and pesticide management ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you