alexa Sustainability Of Water Quantity And Quality Within The Urban Water Cycle
ISSN: 2157-7587

Hydrology: Current Research
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3rd International Conference on Hydrology & Meteorology
September 15-16, 2014 Hyderabad International Convention Centre, India

John Sansalone and Saurabh Raje
Accepted Abstracts: Hydrol Current Res
DOI: 10.4172/2157-7587.S1.015
Abstract
The built environs including urban land uses, infrastructure systems and activities therein, generate particulate matter (PM) and metal loads in rainfall-runoff that are equal to or greater than untreated wastewater discharges and second only to treated wastewater discharges as a source of nutrient loads to receiving waters. Quantifying the nutrient, metals and PM load recovery and economics thereof for the urban water cycle is beneficial for all stakeholders. The idea that sustainability of urban water is quantifiable is critical in all economic conditions. These sustainability operations are essential and coupled with operations that recover gross solids (detritus), coarse PM and associated nutrients (or metals) from the built environs that accumulates as urban watershed inventory; inventory that is transported through, stored in, and on urban drainage infrastructure systems. PM is a mobile substrate and the primary vehicle to and from which nutrients partition from source areas to inland and coastal waters. Control of rainfall-runoff PM is challenging; in part due to the wide gradation of PM, solubility of nutrients, complex geometries of many urban drainage systems and urban water best management practices (BMPs) and episodic events with highly unsteady flow rates. Such challenges and the expense associated with resolving such challenges have led to the common examination of a spectrum of BMPs as black-box systems. The economics and nutrient load reduction of primary maintenance operations (pavement and urban infrastructure appurtenance cleaning) are compared to the functionality of current BMPs whose performance deteriorates as a function of increasing maintenance periods. Experience has demonstrated that there continues to be a gap in knowledge transfer between the design, analysis and monitoring of these BMPs and fundamental unit operations and processes (UOP) concepts, sustainability requirements for BMPs, as well as new developments in the behavior of green urban infrastructure. Tools such as UOP concepts, laser diffraction, computational fluid dynamics (CFD) and continuous simulation modeling are removing urban water controls from the category of ?black-boxes?. With such tools we can now demonstrate treatment viability as a function of the hydrologic, physical, chemical, biological and thermal phenomena for rainfall-runoff or snowmelt. This synthesis is critical whether the objective is hydrologic restoration, source and nearsource control, water chemistry control, water reclamation and reuse, or often, a combination of these. However, storm water systems that do not provide some level of hydrologic restoration, for example through ?green? infrastructure materials, are not sustainable. Further advances with respect to sustainability of urban water require tools such as continuous simulation models, smart sensors and modeling advances such as CFD. The urban water cycle is complex but these complexities can be resolved as presented herein with coupling continuous simulation tools and CFD with physical modeling data.
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