Updates 2014 TarPamlico River Basin Plan Basin Plan
Updates 2014 Tar-Pamlico River Basin Plan
Basin Plan Updates since March Meeting • • • General Statute requirements TMDL goals NSW Strategy Estuary status Action Plan
NC General Statute Chapter 143, Article 21 • § 143 -215. 8 B a. The Commission shall develop and implement a basinwide water quality management plan for each of the 17 major river basins in the State. … b. Each basinwide water quality management plan shall: 1) Provide that all point sources and nonpoint sources of pollutants jointly share the responsibility of reducing the pollutants… 2) If any of the waters located within the river basin are designated as nutrient sensitive waters, then the basinwide water quality management plan shall establish a goal to reduce the average annual mass load of nutrients… c. The Commission shall review and revise its 17 basinwide water quality management plans at least every 10 years … e. A basinwide water quality management plan is not a rule and Article 2 A of Chapter 150 B of the General Statutes does not apply to the development of basinwide water quality management plans. …
Trends Analyses • Seasonal Kendall Flowadjusted Concentrations • Flow-normalized Load Estimates • LOADEST- annual load
TP Load at Grimesland TMDL GOAL: No increase in TP from 1991 Target = 396, 832 lbs/yr Mean 579, 692 lbs/yr (LOADEST) Mean 567, 000 lbs/yr (Flow-normalized load)
TN Load at Grimesland TMDL GOAL: 30% reduction in TN from 1991 Target = 3, 000, 491 lbs/yr Mean 4, 593, 624 lbs/yr (LOADEST) Mean 4, 700, 000 lbs/yr (Flow-normalized Load)
Seasonal Kendall Flow-Adjusted Concentration Percent Change Water Quality Constituents mg/L Ammonia (NH 3) 2002 -2013 Nitrate-Nitrite (NOx) 2002 -2013 Total Kjeldahl Nitrogen (TKN) 2002 -2013 Total Nitrogen (TN) 2002 -2013 Total Phosphorus (TP) 2002 -2013 * No Trend Upper Tar River Fishing Creek Tar River at Tarboro Chicod Creek Grimesland * - 39 % - 41 % - 36 % - 25% - 80 % - 41 % - 42 % - 52 % - 26% + 37 % + 60 % + 44 % * + 55% * + 32 % +38% * +21% * + 12% + 25% * * * +61% +28% * * +39% * -29% * * * +43% +24% +31%
NSW Report • • Trend Analyses Details Review of NSW Strategy & progress Identifies additional sources Recommendations & Needs - Groundwater - Atmospheric deposition - BMP efficiencies - Ag nutrient accounting - Existing development nutrient loads - Estuary nutrient cycling
2014 Chlorophyll a Standard Violations
Upper Station- near Washington Downstream Station- below Bath Creek, near Aurora
Estuary Chlorophyll a Exceedence vs. Flow
Action Plan • Nutrient Sensitive Water Rules Review – Ag baseline adjustments – Stormwater updates • Watershed Model – Identify data needed for development of model • Watershed Monitoring & Trends – Additional assessment of organic nitrogen • Groundwater Monitoring – Commence groundwater quality monitoring • • • Stormwater Agriculture Nutrient Tracking Atmospheric Deposition Threatened & Endangered Spp Aquaculture Facilities Restoration Prioritization
Basin Plan Website
Request to proceed to EMC with Final Tar-Pamlico River Basin Plan in Accordance to General Statute 143. 215. 8 B
Extra Estuary Chlorophyll a slides
- Slides: 28