Water Environment & Reuse Foundation (WE&RF) awarded a contract recently to Brown and Caldwell to create Modeling Guidance for Developing Site-Specific Nutrient Goals – Demonstration, Screening Level Application (LINK4T17).
This project builds on earlier WE&RF research, called LINK1T11, which developed modeling guidance for site-specific nutrient goals and an associated Nutrient Modeling Toolbox, which can be used for deriving site-specific water quality criteria for nutrients.
It provides a system that can link nutrient loads to water quality and ecological response indicators on a site-specific basis, making use of several factors such as kinds of waterbodies, chemical response indicators, and total maximum daily load applications.
The Nutrient Modeling Toolbox was demonstrated in Boulder, Colorado (LINK2T14) on a shallow stream to choose and calibrate a nutrient response model of the creek. This study indicated that the toolbox will benefit from default management strategies.
Restrictions on data and resources can thwart complete calibration of models in planning and permitting situations.
The LINK4T17 study will indicate the utility of screening-level models for deriving site-specific nutrient goals.
Though these models use limited data, they can be applied to forecast the relative sensitivity of response variables, such as attached algae, to pre-defined treatment levels.
Screening-level applications are important where stream data is not available to produce a calibrated model of nutrient response. They will be useful in the regulatory process for identifying management strategies that safeguard designated uses.
The study team will build a process and a tool for applying screening-level models in small river settings. The team will test the process and the tool in three river settings. Together, these research products will further the use of regulatory approaches for minimising nutrient pollution, including site-specific nutrient criteria, adaptive management, and variances.
The team will depend on an advisory group with representatives from both eastern and western states, as well as utilities and state permitting agencies.
This advisory group will ensure that the process and tool are applicable to real permitting and planning situations and the process is expected to be completed in 2018.
from Water Technology-Updates http://ift.tt/2w3BuXo
via IFTTT
No comments:
Post a Comment