East Baton Rouge Parish Micro-Watershed Characterization

Transcription

1 26 th Annual Louisiana Remote Sensing and GIS Workshop José E. Villalobos-Enciso Warren L. Kron, Jr. April 28, 2010

2 Presentation Outline Objectives Warren Kron Data Warren Kron Concept José Villalobos Methodology José Villalobos Preliminary Results José Villalobos Conclusions José Villalobos

3 Improve Stormwater Management Codes Regulate the amount of new impervious surfaces in each watershed especially those in threatened watersheds Complement the Parish Storm Water Management Plan with new and improved Best Management Practices Encourage use of natural topography to convey runoff Promote incremental stormwater runoff storage and treatment using aesthetic and well-designed retention ponds

4 Create Stream Bank Protection Codes Establish Best Management Practices (BMP) along natural and man-made stream banks Protect and replant native vegetation along stream banks Encourage use of natural topography, wetlands, detention ponds, and riparian zones to convey runoff Develop regulations for conservation areas for the protection of natural and man-made wetlands

5 Improve Water Quality Codes Regulate specific micro-watersheds for implementing Best Management Practices for improving water quality Require Best Management Practices to mitigate the effects of point and non-point source pollution in streams

6 EBRP Digital Elevation Model Source: 2001 USGS, USACE

7 EBRP Existing Land Use Source: 2010 City-Parish Planning Commission

8 EBRP Soils (Drainage Class) Excessively drained Moderately well drained Poorly drained Somewhat poorly drained Very poorly drained Well drained Source: 2007 USDA/NRCS

9 EBRP Soils (Hydrologic Group) Low runoff potential Moderately low runoff potential Moderately high runoff potential High runoff potential Source: 2007 USDA/NRCS

10 EBRP Soils (Drainage Class) Excessively drained Moderately well drained Poorly drained Somewhat poorly drained Very poorly drained Well drained Source: 2007 USDA/NRCS

11 EBRP Tree Canopy Coverage 0 25 % % % % Source: 2001 USGS

12 EBRP Land Cover LEGEND Open water Open space development Low intensity development Medium intensity development High intensity development Barren Land Deciduous Forests Evergreen Forests Mixed Forests Shrub and Scrub Grassland Pastures Cultivated Crops Woody Wetlands Emergent Herbaceous Wetlands Source: 2001 USGS

13 EBRP Impervious Surfaces Percent Imperviousness Values 0 10 % % % % % % % % % % Source: 2001 USGS

14 Concept Micro-Watersheds Drainage area, bounded peripherally by a divide, which contributes water, sediment and dissolved materials to a particular point along a stream, channel network or depression based on its surface topography

15 Methodology Data Collection Analysis DEM Delineate stream segments Delineate watersheds Compute geomorphic parameters Elevation Land Use Soils Tree Canopy Land Cover Imperviousness Characterize Classify Microwatershed Stream segments Establish watershed BMP

16 Products Stream segments (5,018) Micro-watersheds (703)

17 Products Geologic Faults of Baton Rouge Cause damage to road, pavement, and building structures gradually, over periods of decades The rate of movement along them has increased in connection with human activities such as drainage alteration and groundwater withdrawal (McCulloh, 2008) Micro-watersheds/Geologic Faults

18 Preliminary Results Percent Imperviousness 0 25 % % % % Micro-Watersheds and Impervious Surfaces

19 Preliminary Results Percent Canopy Coverage 0 25 % % % % Micro-Watersheds and Tree Canopy Coverage

20 Preliminary Results Count of Point Source Pollution Potential Point Source Pollution per Micro-Watershed

21 Preliminary Results 5 Clusters of Micro-Watersheds with similar geomorphic characteristics

22 Conclusions Provide a basis for the Unified Development Code (UDC) amendments Building Setbacks Land Use Planning Landscape Buffers Best Management Practices Provide more information to improve the Environmental Planning Process Successful collaboration between City-Parish, State, and Federal agencies

23 City of Baton Rouge Parish of East Baton Rouge Planning Commission GIS Division (225) José E. Villalobos-Enciso Warren L. Kron, Jr.