Jenny X. Zhen

Jenny X. Zhen
Tetra Tech | TETRATECH · Water Resources

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26
Publications
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741
Citations

Publications

Publications (26)
Article
Low impact development best management practices (LID-BMPs) are considered to be cost-effective measures for mitigating the water quantity and quality impact of urban runoff. Currently, there are many types of LID-BMPs, and each type has its own intrinsic technical and/or economical characteristics and limitations for implementation. The selection...
Article
U.S. Environmental Protection Agency developed a decision-support system, System for Urban Stormwater Treatment and Analysis Integration (SUSTAIN), to evaluate alternative plans for stormwater quality management and flow abatement techniques in urban and developing areas. SUSTAIN provides a public domain tool capable of evaluating the optimal locat...
Technical Report
Full-text available
The System for Urban Stormwater Treatment and Analysis Integration (SUSTAIN) was developed by the U.S. Environmental Protection Agency (EPA) to provide stormwater managers with a decision support system for the cost-efficient selection and placement of stormwater best management practices (BMPs) in urban watersheds. The SUSTAIN modeling system inte...
Conference Paper
Various Total Maximum Daily Loads (TMDLs) developed for Los Angeles County watersheds require comprehensive implementation plans to strategize specific best management practices (BMPs) to meet required pollutant load reductions during storm events. Ongoing efforts for assessment of BMPs in Los Angeles County have repeatedly indicated a need to iden...
Article
Full-text available
Several Total Maximum Daily Loads (TMDL) have been developed for multiple river segments for pollutants (including nutrients, metals, and bacteria) within the Los Angeles County regional watershed area, with urban runoff and stormwater as the primary source. Managing stormwater quality is complex because it involves many aspects that must be consid...
Conference Paper
The Los Angeles County Flood Control District through a joint effort with United States Environmental Protection Agency has been developing the Watershed management Modeling System (WMMS) that would identify cost-effective water quality improvement projects through an integrated, watershed based approach. In WMMS, watershed model closely estimates...
Conference Paper
Efforts have been under way by the U.S. Environmental Protection Agency (EPA) since 2003 to develop a decision-support tool for placement of best management practices (BMPs) at strategic locations in urban watersheds. The tool is called the System for Urban Stormwater Treatment and Analysis INtegration (SUSTAIN). It is designed for use by watershed...
Conference Paper
The Los Angeles County Flood Control District (LACFCD) is currently developing a decision support system to evaluate the most cost-effective combination of distributed and entralized BMPs to support water quality improvement planning of the County's watersheds, including the evaluation of the benefits of decentralized BMPs and potential savings in...
Conference Paper
Prince George's County has developed a Best Management Practices Decision Support System (BMPDSS) to assist in assessing the effectiveness of Low Impact Development (LID) technologies. This module uses process-based algorithms to simulate BMP function and removal efficiency. The processes include weir and orifice outflow, flow and pollutant routing...
Conference Paper
Since 2003, the U.S. Environmental Protection Agency has been developing a decision support system for placement of best management practices (BMPs) at strategic locations in urban watersheds. This system is called the System for Urban Stormwater Treatment and Analysis INtegration (SUSTAIN). One dominant technical requirement for SUSTAIN is the abi...
Conference Paper
Lake Tahoe is a designated Outstanding National Resource Waterbody. However, lake clarity has dropped at a rate of 9 inches per year since the late 1960s, with ultra-fine sediment and nutrient driven algae production as the primary stressors. The primary sources have been identified as urban runoff and forest upland erosion, atmospheric deposition,...
Conference Paper
Protecting environmental quality requires a comprehensive approach that heavily relies on our ability to confidently predict or forecast impacts, evaluate the ability of natural systems to absorb impacts, and determine the combination of options that will provide an acceptable level of protection and/or restoration. These forecasts, when accepted,...
Article
Lake Tahoe is a designated Outstanding National Resource Waterbody. However, lake clarity has dropped at a rate of 9 inches per year since the late 1960s, with ultra-fine sediment and nutrient driven algae production as the primary stressors. The four primary sources identified include urban runoff, forest erosion, atmospheric deposition, and strea...
Article
Full-text available
To assist stormwater management professionals in planning for implementation of best management practices (BMPs), efforts have been under way by the U. S. Environmental Protection Agency (EPA) since 2003 to develop a decision-support system for placement of BMPs at strategic locations in urban watersheds. This tool will help develop, evaluate, sele...
Article
Prince George’s County, Maryland, in the Washington D.C. metropolitan area has developed a best management practice decision support system (BMPDSS) to support analysis and decision making for stormwater management planning and design at both the site scale and the watershed levels. This paper presents a detailed description of the BMPDSS. A case s...
Conference Paper
To assist stormwater management professionals in planning for best management practices (BMPs) implementation, the U.S. Environmental Protection Agency (USEPA) is developing a decision-support system for placement of BMPs at strategic locations in urban watersheds. This tool will help develop, evaluate, select, and place BMP options based on cost a...
Conference Paper
Best management practices for controlling urban runoff pollution are normally designed using the design-storm approach at the site level. In general, the design criteria specify that the post-development peak discharge should be attenuated to the pre development rate, and that a certain water quality volume of runoff should be treated for a selecte...
Article
Best Management Practices (BMPs) are measures for mitigating nonpoint source (NPS) pollution caused mainly by stormwater runoff. Established urban and newly developing areas must develop cost effective means for restoring or minimizing impacts, and planning future growth. Prince George's County in Maryland, USA, a fast-growing region in the Washing...
Conference Paper
Decentralized and integrated stormwater management is becoming an efficient alternative to more conventional "centralized" structural Best Management Practices (BMPs). Decentralized management techniques, targeted to provide infiltration and minimize runoff closer to the sources, not only meet the stormwater control targets but also maintain the na...
Article
We have developed a suite of enhancements and total maximum daily load (TMDL) tools for the legacy Generalized Watershed Loading Functions (GWLF) model. GWLF has been widely used in TMDL development to calculate watershed pollutant loads because of its simplicity, efficiency, and low data requirements on input and calibration. One of the major disa...
Article
Nonpoint source pollution control requires the implementation of best management practices (BMPs) at various locations in a watershed. One important aspect of the watershed strategy is to find the optimal placement and design of BMPs so that their combined effect is most cost-effective. An innovative method is presented for optimizing the placement...
Conference Paper
Low-impact development (LID) techniques can be used for controlling stormwater impacts from new development and redevelopment / urban retrofit. Prince George's County has developed a Best Management Practices (BMPs) evaluation module to assist in assessing the effectiveness of LID technologies. This module uses process-based algorithms to simulate...
Conference Paper
The U.S. Environmental Protection Agency (USEPA) has funded the development of a decision support system for selection and placement of best management practices (BMPs) at strategic locations in urban watersheds. The primary objective of the system is to provide stormwater management professionals with a BMP assessment tool based on sound science a...

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