26 th Annual Louisiana Remote Sensing and GIS Workshop José E. Villalobos-Enciso Warren L. Kron, Jr. April 28, 2010
Presentation Outline Objectives Warren Kron Data Warren Kron Concept José Villalobos Methodology José Villalobos Preliminary Results José Villalobos Conclusions José Villalobos
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
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
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
EBRP Digital Elevation Model Source: 2001 USGS, USACE
EBRP Existing Land Use Source: 2010 City-Parish Planning Commission
EBRP Soils (Drainage Class) Excessively drained Moderately well drained Poorly drained Somewhat poorly drained Very poorly drained Well drained Source: 2007 USDA/NRCS
EBRP Soils (Hydrologic Group) Low runoff potential Moderately low runoff potential Moderately high runoff potential High runoff potential Source: 2007 USDA/NRCS
EBRP Soils (Drainage Class) Excessively drained Moderately well drained Poorly drained Somewhat poorly drained Very poorly drained Well drained Source: 2007 USDA/NRCS
EBRP Tree Canopy Coverage 0 25 % 25 50 % 50 75 % 75 100 % Source: 2001 USGS
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
EBRP Impervious Surfaces Percent Imperviousness Values 0 10 % 10 20 % 20 30 % 30 40 % 40 50 % 50 60 % 60 70 % 70 80 % 80 90 % 90 100 % Source: 2001 USGS
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
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
Products Stream segments (5,018) Micro-watersheds (703)
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
Preliminary Results Percent Imperviousness 0 25 % 25 50 % 50 75 % 75 100 % Micro-Watersheds and Impervious Surfaces
Preliminary Results Percent Canopy Coverage 0 25 % 25 50 % 50 75 % 75 100 % Micro-Watersheds and Tree Canopy Coverage
Preliminary Results Count of Point Source Pollution 0 20 20 40 40 60 60 80 80 100 100 120 Potential Point Source Pollution per Micro-Watershed
Preliminary Results 5 Clusters of Micro-Watersheds with similar geomorphic characteristics
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
City of Baton Rouge Parish of East Baton Rouge Planning Commission GIS Division (225) 389-3144 José E. Villalobos-Enciso jvillalobos@brgov.com Warren L. Kron, Jr. wkron@brgov.com http://www.brgov.com/dept/planning http://gis.brgov.com