Project Report: Development of a TMDL for the Wanaque Reservoir
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Project Report Development of a TMDL for the Wanaque Reservoir and Cumulative WLAs/LAs for the Passaic River Watershed Submitted To Division of Watershed Management NJ Department of Environmental Protection Trenton, New Jersey June 2005 Project Report Development of a TMDL for the Wanaque Reservoir and Cumulative WLAs/LAs for the Passaic River Watershed Submitted To Division of Watershed Management NJ Department of Environmental Protection Trenton, New Jersey June 2005 NAJARIAN ASSOCIATES Eatontown, New Jersey TABLE OF CONTENTS 1. Introduction............................................................................. 1-1 1.1 TMDL Basis.....................................................................................1-1 1.2 Objectives .......................................................................................1-2 1.3 Approach.........................................................................................1-2 2. Reservoir Characteristics...................................................... 2-1 2.1 Reservoir’s Tributary Watershed ..................................................2-2 2.2 Diversion Intake Sites ....................................................................2-4 2.3 Previous Studies of Reservoir Water Quality ..............................2-8 3. River Simulation..................................................................... 3-1 3.1 Model Development .......................................................................3-1 3.2 Data Preparation.............................................................................3-3 3.3 River Model Application – Current Condition..............................3-5 3.4 River Model Projections – Future Condition................................3-8 3.5 River Model Sensitivity ................................................................3-13 4. Reservoir Simulation.............................................................. 4-1 4.1 Reservoir Model Description.........................................................4-1 4.2 Reservoir Model Modifications .....................................................4-2 4.3 Model Inputs for Simulation of Baseline Conditions .................4-3 4.4 Model Output for Simulation of Baseline Conditions .................4-6 5. Evaluation of Reservoir Endpoints ....................................... 5-1 5.1 Reference Conditions ....................................................................5-1 5.2 Alternative Endpoints ....................................................................5-1 5.3 Discussion of Endpoint Alternatives............................................5-2 5.4 Conditions for TMDL Development ..............................................5-3 5.5 Endpoint Compliance for PS and NPS Reductions..................... 5.4 5.6 Endpoint Selection......................................................................... 5.7 6. Development of TMDL............................................................ 6-1 6.1 Wanaque Reservoir TMDL.............................................................6-1 6.2 Ramapo/Pompton/Passaic River Load Allocations.....................6-2 6.3 Margin of Safety (MOS)..................................................................6-3 6.4 Compatibility with Other Studies ..................................................6-3 7. Summary of Results............................................................... 7-1 References -i- List of Tables 2.1 Geometric Description of Reservoirs.....................................................................2-1 2.2 Reservoir Sub-watershed Statistics........................................................................2-2 2.3 Land Use Data for New Jersey Portion of Reservoir Watershed...........................2-3 2.4 Treatment Facilities within the Reservoir’s Tributary Watershed.........................2-3 2.5 Summary of Total Phosphorus Data for Reservoir Tributaries .............................2-4 2.6 Summary of Nitrate Data for Reservoir Tributaries ..............................................2-4 2.7 Characteristics of Reservoir Intake Sites ...............................................................2-5 2.8 Wastewater Treatment Plant Data..........................................................................2-6 2.9 Summary of Nutrient Data for River Intake Sites..................................................2-7 2.10 Summary of Continuous Dissolved Oxygen Data .................................................2-8 3.1 Error Analysis of Model Result for Total Phosphorus ..........................................3-8 3.2 Treatment Facilities Located in the Ramapo Watershed –NY ..............................3-9 3.3 Treatment Facilities Located in the Ramapo Watershed – NJ.............................3-10 3.4 Simulation of Future Conditions at Ramapo River at Pompton Lakes................3-10 3.5 Treatment Facilities Located in the Lower Pompton Watershed.........................3-11 3.6 Treatment Facilities Located in the Upper Pompton Watershed .........................3-11 3.7 Simulation of Future Conditions at Pompton River at Two Bridges ...................3-12 3.8 Treatment Facilities Located in the Upper Passaic Watershed............................3-12 3.9 Simulation of Future Conditions at Passaic River at Two Bridges .....................3-13 3.10 Annual Loading Breakdown for Selected Control Sites......................................3-14 3.11 Results from Sensitivity Analysis........................................................................3-14 4.1 USGS Gaging Stations ..........................................................................................4-3 4.2 Reservoir Hydrologic and Phosphorus Loading Budget........................................4-5 5.1 Endpoint Compliance for 0% NPS Load Reduction..............................................5-5 5.2 Endpoint Compliance for 40% NPS Load Reduction............................................5-5 5.3 Endpoint Compliance for 80% NPS Load Reduction............................................5-5 5.4 Comparison of Potential Implementation Strategies .............................................5-6 6.1 TMDL Calculations for the Wanaque Reservoir ...................................................6-5 6.2 TMDL Calculations for the Ramapo River Watershed .........................................6-6 6.3 TMDL Calculations for the Pompton River Watershed ........................................6-7 6.4 TMDL Calculations for the Passaic Watershed (above Pompton Confluence).....6-8 6.5 TMDL Calculations for the Whippany River Watershed ......................................6-9 6.6 TMDL Calculations for the Rockaway River Watershed....................................6-10 6.7 TMDL Calculations for the Passaic Watershed (above Rockaway Confluence) 6-11 6.8 TMDL Calculations for the Passaic Watershed (above Canoe Confluence).......6-12 6.9 Areal Breakdown of Watershed Land Uses.........................................................6-13 6.10 WLAs for Treatment Facilities in the Pompton Watershed.................................6-14 6.11 WLAs for Treatment Facilities in the Passaic Watershed ...................................6-15 -ii- List of Figures 2.1 Passaic River Watershed 2.2 Wanaque and Monksville Reservoirs 2.3 Land Use Distribution in the Wanaque Reservoir Watershed 2.4 Distribution of Wastewater Treatment Plant Flows 2.5 Daily DO Variation for Passaic River below Two Bridges 2.6 Observed Pompton River Flows vs. Two Bridges Pumpage 3.1 Study Area and Selected Monitoring Locations 3.2 Mass Balance Simulation of Phosphorus for Passaic River at Chatham 3.3 Mass Balance Simulation of Phosphorus for Rockaway River at Pine Brook 3.4 Mass Balance Simulation of Phosphorus for Whippany River at Pine Brook 3.5 Mass Balance Simulation of Phosphorus for Passaic River at Two Bridges 3.6 Mass Balance Simulation of Phosphorus for Ramapo River at Mahwah 3.7 Mass Balance Simulation of Phosphorus for Ramapo River at Pompton Lakes 3.8 Mass Balance Simulation of Phosphorus for Pompton River at Two Bridges 3.9 Mass Balance Simulation of Phosphorus for Passaic River at Little Falls 3.10 Cumulative Frequency Distribution for Passaic River at Chatham 3.11 Cumulative Frequency Distribution for Rockaway River at Pine Brook 3.12 Cumulative Frequency Distribution for Whippany River at Pine Brook 3.13 Cumulative Frequency Distribution for Passaic River at Two Bridges 3.14 Cumulative Frequency Distribution for Ramapo River at Mahwah 3.15 Cumulative Frequency Distribution for Ramapo River at Pompton Lakes 3.16 Cumulative Frequency Distribution for Pompton River at Two Bridges 3.17 Cumulative Frequency Distribution for Passaic River at Little Falls 3.18 Correlation between Simulated and Observed Data for Passaic River at Chatham 3.19 Correlation between Simulated and Observed for Rockaway River at Pine Brook 3.20 Correlation between Simulated and Observed for Whippany River at Pine Brook 3.21 Correlation between Simulated and Observed for Passaic River at Two Bridges 3.22 Correlation between Simulated and Observed for Ramapo River at Mahwah 3.23 Correlation between Simulated/Observed for Ramapo River at Pompton Lakes -iii- 3.24 Correlation between Simulated and Observed for Pompton River at Two Bridges 3.25 Correlation between Simulated and Observed for Passaic River at Little Falls 3.26 Model Sensitivity to Runoff Loads 3.27 Sensitivity Analysis for Passaic River at Two Bridges 3.28 Sensitivity Analysis for Pompton River at Two Bridges 3.29 Sensitivity Analysis for Ramapo River