Finite element approaches generally do not guarantee exact satisfaction of conservation laws especially when Dirichlet-type boundary conditions are imposed. This article discusses improvement of the global mass conservation property of quasi-bubble nite element solutions for the shallow water equations, focusing on implementations of the surface-elevation boundary conditions. We propose two alt...

This paper describes recent experience with integrated resource planning (IRP) and the application of least cost planning (LCP) for the evaluation of demand management strategies in urban water. Two Australian case studies, Sydney and Northern New South Wales (NSW) are used in illustration. LCP can determine the most cost effective means of providing water services or alternatively the cheapest...

Many conservation programs under the 2002 Farm Act address resource concerns such as water quality and aquatic communities in streams. Analyzing two such programs, simulated changes in agricultural practices decreased field-edge sediment losses by 25S31% in two geophysically distinct Minnesota watersheds. However, while in-stream sediment concentrations and lethal fisheries events decreased sig...

1. Introduction Water Distribution Systems (WDSs) capable of supplying a sufficient quantity of potable water are one of the key infrastructures for a modern sustainable city. The service quality of WDSs is closely related to water conservation and various detrimental disturbances in WDSs, such as pipe bursts and leaks, will result in significant water loss. World-widely, it is reported that 11...

since wheat-rice cropping system is down in about 50000 hectare of khoozestan province and also necessity of optimum land and water utilization, this study was condulted during one year (2008-2009) in shawoor agricultural research station to compare different conservation tillage system with traditional system for wheat cultivation in paddy residue. experiment conducted in randomized complete b...

The time-dependent motion of water waves with a parametrically-defined free surface is mapped to a fixed time-independent rectangle by an arbitrary transformation. The emphasis is on the general properties of transformations. Special cases are algebraic transformations based on transfinite interpolation, conformal mappings, and transformations generated by nonlinear elliptic PDEs. The aim is to...

The water management policies adopted to address Israel's chronic scarcity have not been without environmental consequences. Yet, through a trial-and-error process, a combined strategy of water transport, rainwater harvesting, and wastewater reuse and desalination, along with a variety of water conservation measures, have put the country on a more sustainable path for the future.

toufiek samaai, mark j. gibbons and michelle kelly Marine and Coastal Management, Ecosystem Utilisation and Conservation, P/B X2, Roggebaai, 8012, South Africa, Biodiversity and Conservation Biology Department, University of the Western Cape, PO Box X17, Bellville, Cape Town, South Africa, National Centre for Aquatic Biodiversity and Biosecurity, National Institute of Water and Atmospheric Rese...

Supplemental material available online. Soil Sci. Soc. Am. J. 78:1493–1499 doi:10.2136/sssaj2014.03.0110 Received 20 Mar. 2014. *Corresponding author ([email protected]). © Soil Science Society of America, 5585 Guilford Rd., Madison WI 53711 USA All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, includin...