Hydrology & Hydraulics
- Guidelines
- Manuals
- Design Aids
- Related Links
- Concrete Pipe Design Manual
- DNREC Erosion & Sediment Control Handbook
- TR-20 User Guide
- Win TR-55 User Manual
- FHWA Hydraulic Library Listing
- HDS Manuals
- HEC Manuals
- HEC No. 14 - Hydraulic Design of Energy Dissipaters for Culverts and Channels
- HEC No. 15 - Design of Roadside Channels with Flexible Linings
- HEC No. 22 - Urban Drainage Design Manual, 3rd Edition
- HEC No. 25 – Volume 1 – Highways in the Coastal Environment
- HEC No. 25 – Volume 2 – Highways in the Coastal Environment: Assessing Extreme Events
| Drainage Pipe Design | ||
|---|---|---|
| File Name | Date Updated | Description |
| Pipe Cover Angle Worksheet | 04/17/2023 | Allowable Pipe Deflection and Cover |
| Standard Installations | 01/02/2014 | ACPA Presentation for Indirect Design for Reinforced Concrete Pipe |
| Post Installation Evaluation and Repair Methods for Installed Reinforced Concrete Pipe | 01/02/2014 | Post Installation Evaluation and Repair Methods for Installed Reinforced Concrete Pipe |
| Fill Height Tables for Round Reinforced Concrete Pipe | 01/02/2014 | Fill Height Tables for Round Reinforced Concrete Pipe |
| Fill Height Tables for Elliptical Reinforced Concrete Pipe | 01/02/2014 | Fill Height Tables for Elliptical Reinforced Concrete Pipe |
| Arched RCP Deflections | 04/19/2007 | Maximum deflections for Arched RCP Pipe |
| Circular RCP Deflections | 04/19/2007 | Maximum deflections for Circular RCP Pipe |
| Horizontal Elliptical RCP Deflections | 04/19/2007 | Maximum deflections for Horizontal Elliptical RCP Pipe |
| Miscellaneous | ||
|---|---|---|
| File Name | Date Updated | Description |
| Drainage Design Workflow | ||
| Map of New Castle County Watersheds | 04/24/2007 | Watersheds Map - New Castle County |
| DNREC Rainfall Distribution Regulatory Guidance | 11/17/2019 | Sediment and Stormwater Program Regulatory Guidance Memorandum RGM-1 (NOAA Rainfall Distribution Curves) |
| New Castle County IDF Data | 03/04/2024 | New Castle County IDF Info - NOAA ATLAS 14 Precipitation Frequency Data Server. |
| Kent County IDF Data | 03/04/2024 | Kent County IDF Info - NOAA ATLAS 14 Precipitation Frequency Data Server. |
| Sussex County IDF Data | 03/04/2024 | Sussex County IDF Info - NOAA ATLAS 14 Precipitation Frequency Data Server. |
American Concrete Pipe Association
Technical resources, webinars & Pipe School.
US Climate Resilience Toolkit
The purpose of the U.S. Department of Transportation's Coupled Model Intercomparison Project (CMIP) Climate Data Processing Tool is to process readily available downscaled climate data at the local level into relevant statistics for transportation planners. This tool works with data used by the Downscaled CMIP3 and CMIP5 Climate and Hydrology Projections (DCHP) website. This website houses climate model data from phase 3 (CMIP3) and phase 5 (CMIP5) of the World Climate Research Program.
FHWA Hydraulic Toolbox
Specific calculators address: Rational Method hydrology, channels, channel linings, weirs, curb and gutter sections, storm drain inlets, detention basins, bridge scour, riprap countermeasures, sediment gradations, and culvert assessments.
NOAA Sea Level Trends
This web link redirects you to the National Oceanic and Atmospheric Administration (NOAA) Sea Level Rise and Coastal Flooding Impacts web page. On this page you can view the potential impacts that may occur along the Mid-Atlantic coast line at various levels of rise in sea level elevation.
Stormwater Assessment Study GIS Tool
This web link redirects you to the DNREC Sediment & Stormwater Program Map Server webpage. Includes soils maps, tax ditch delineations and other useful information for drainage and SWM design.
Technical resources, webinars & Pipe School.
US Climate Resilience Toolkit
The purpose of the U.S. Department of Transportation's Coupled Model Intercomparison Project (CMIP) Climate Data Processing Tool is to process readily available downscaled climate data at the local level into relevant statistics for transportation planners. This tool works with data used by the Downscaled CMIP3 and CMIP5 Climate and Hydrology Projections (DCHP) website. This website houses climate model data from phase 3 (CMIP3) and phase 5 (CMIP5) of the World Climate Research Program.
FHWA Hydraulic Toolbox
Specific calculators address: Rational Method hydrology, channels, channel linings, weirs, curb and gutter sections, storm drain inlets, detention basins, bridge scour, riprap countermeasures, sediment gradations, and culvert assessments.
NOAA Sea Level Trends
This web link redirects you to the National Oceanic and Atmospheric Administration (NOAA) Sea Level Rise and Coastal Flooding Impacts web page. On this page you can view the potential impacts that may occur along the Mid-Atlantic coast line at various levels of rise in sea level elevation.
Stormwater Assessment Study GIS Tool
This web link redirects you to the DNREC Sediment & Stormwater Program Map Server webpage. Includes soils maps, tax ditch delineations and other useful information for drainage and SWM design.
