A Multistate Water Quality A Multistate Water Quality Trading Tool for theTrading Tool for theTrading Tool for the Trading Tool for the

Chesapeake BayChesapeake Bay

Mindy Selman & Sara WalkerMindy Selman & Sara WalkerDecember 16, 2011December 16, 2011December 16, 2011December 16, 2011

NutrientNet/NTT

NutrientNet:R i t– Registry

– Marketplace– Calculation Tools (NTT +

GIS + policy)

NTT:– dynamic biophysical model– APEX, RUSLE2, Century

Developed through NRCS– Developed through NRCS– Nutrients, Sediments & C

Multistate Platform

CIG to create a single multistate WQT platform (NutrietnNet/NTT) that will accommodate:accommodate:

I t t t t di• Interstate trading

• Unique elements of state programs

Benefits

• Align infrastructureAlign infrastructure

• Facilitate trades• Standard basis for

determining credits

• Integrated registry

F ilit t d t• Facilitate updates

Calculation Considerations

• Trading ratios

• Baselines

• practice vs. pperformance

• farm vs. field

• Allowable practices• Accommodating

evaluation uses• CBWM

NutrientNet Calculations

Chesapeake Bay Watershed Model

NTTManagement Info

Spatial Info

NTT Output (Edge of Farm)

= NTTStructural BMPs

Current TMDL

Trading Eligibility NTT

= NutrientNetOperations

Edge of Segment Delivery

Current Load (EOS)

TMDL Baseline (EOS)

= CBWM

Thank YouThank You

mindy.selman@wri.orgmindy.selman@wri.orglk @ ilk @ isara.walker@wri.orgsara.walker@wri.org