URE

Municipal GIS ApplicationsMunicipal GIS Applications

JOHN C. CHLARSON, P.E.JOHN C. CHLARSON, P.E.UNIVERSITY OF TENNESSEEUNIVERSITY OF TENNESSEE

MUNICIPAL TECHNICAL ADVISORY SERVICEMUNICIPAL TECHNICAL ADVISORY SERVICE

F URE

http://www.utk.edu/

Municipal GIS ApplicationsMunicipal GIS ApplicationsWhat are local governments doing with GIS?


Water/Sewer/StormAsset ManagementWork Order ManagementField Data CollectionCapital Improvement PlanningWorkforce Management


Public WorksAsset ManagementWork Order ManagementField Data CollectionCapital Improvement PlanningCall Center IntegrationTree Inventories


Emergency ManagementAd-Hoc Map ProductionIncident Management System IntegrationCommon Operational PictureField Data CollectionPublic Safety/HLS Exercise & Evaluation Programs


Law EnforcementCrime Analysis & ReportingCAD/RMS IntegrationCommon Operational Picture/ComStatCritical Infrastructure Protection and Planning (BZPP)Mobile Data Solutions (Mobile Data Terminals)


Land Records ManagementCAMA IntegrationPublic AccessLand Assessment & AnalysisMobile Data Collection

CartographyCartography

Information ManagementInformation ManagementWhich parcels are within 50 feet of the road?

Well type Drilled

Building owner Smith

Soil type Sandy

• ProximityProximity

• OverlayOverlay

• NetworkNetwork

What Survey Control is within 1/2 mile of my project area?

Land Use and TransportationLand Use and Transportation

TransportationTransportation

Regional PlanningRegional Planning

Urban PlanningUrban Planning

SustainabilitySustainability

InfrastructureInfrastructure

Electric UtilitiesElectric UtilitiesFlood ControlFlood Control

Storm WaterStorm Water

Water SystemsWater SystemsCadastralCadastral

TrafficTraffic

SewerSewer

Natural EnvironmentNatural Environment

GeologyGeologyHydrologyHydrology

MarineMarine

EnvironmentalEnvironmental

Public SafetyPublic Safety

Coastal FloodingCoastal Flooding

EarthquakesEarthquakesHurricanesHurricanes

FireFire

CrimeCrime

Dam RuptureDam Rupture

HomelandHomeland SecuritySecurity

Scenario ManagementScenario Management

Airborne ContaminantsAirborne Contaminants

Disaster AssessmentDisaster AssessmentSecurity Maps on DemandSecurity Maps on Demand

Engineering and ConstructionEngineering and Construction

SurveyingSurveying

Site EngineeringSite Engineering

Facilities ManagementFacilities Management

Asset ManagementAsset Management

ConstructionConstruction

Stormwater: GIS and TMDL MonitoringStormwater: GIS and TMDL Monitoring

• TMDL monitoring for the MS4s will be pendant on the specific type of TMDL. There are three protocols:

• Visual Stream Assessment and Inventory - based on EPA’s and NRCS’s visual assessment protocols and is being developed by Jimmy Smith and John Burr. The basics in the assessments will be the identification, documentation and prioritization of the sources of the pollution within the entire HUC 12 watersheds within a 5-year period.

• RBP3 protocol - strait from our SOP/QAPP and will include at least one sample per HUC 12 in a 5-year period.

• Chemical and biological - also from our SOPs/QAPP, utilizing the identified parameter lists and methodologies and will include 1 set of samples (12 monthly/4 during high flow) per 5-year period.


The chart below is a summary of the requirements:

Monitoring Requirement Sediment/Habitat Alteration TMDL Metals TMDL Pathogens TMDL Nutrients TMDLVisual Stream Assessment and Inventory X X X X1 or more RPB3 Benthic Sample X X XChemical and Bacteriological Sample of Surface Water X X X

Stormwater: GIS MethodologyStormwater: GIS Methodology

What isWhat is

Low Impact Development?Low Impact Development?•Comprehensive, landscape-based

approach to sustainable development

•Set of strategies to maintain existing natural systems, hydrology, ecology

•Cost-effective, flexible approach based on a toolkit of simple techniques

•Collection of practices that have been implemented nationwide

WHY DO WE NEED LOW IMPACT DEVELOPMENT?WHY DO WE NEED LOW IMPACT DEVELOPMENT?

Conventional strategies Conventional strategies aren’t workingaren’t working

•Increased runoff & decreased recharge

•Loss of vegetation and wildlife habitat

•Loss of community character

•Polluted waterways

•Cost of development

Typical pre-development conditions: Runoff = 10% Infiltration = 50%

WHY DO WE NEED LOW IMPACT DEVELOPMENT? WHY DO WE NEED LOW IMPACT DEVELOPMENT?

Typical post-development conditions:

Runoff = 55% Infiltration = 15%

WHY DO WE NEED LOW IMPACT DEVELOPMENT?WHY DO WE NEED LOW IMPACT DEVELOPMENT?

LID PRINCIPLESLID PRINCIPLES

Use existing natural systems as the Use existing natural systems as the integrating framework for site planningintegrating framework for site planning

• Land use planning and watershed planning

• Identify environmentally sensitive resources: wetlands, mature trees, slopes, drainageways, permeable soils, waterway buffers

• Assess existing hydrology

• Define a development envelope

LID STRATEGIESLID STRATEGIES

Low Impact Site DesignLow Impact Site Design• Conservation of

natural hydrology, trees, vegetation

• Stream & wetland buffers

• Minimize impervious surfaces

• Stormwater micromanagement

• Ecological landscaping

Typical Subdivision

Conservation


Low Impact Site DesignLow Impact Site DesignOpen Space Residential DesignOpen Space Residential Design

1. Identify Conservation Areas




2. Locate House Sites





3. Align Roads & Trails



3. Align Roads & Trails

4. Draw the Lot Lines

Open Space Residential DesignOpen Space Residential Design


Low Impact Site DesignLow Impact Site Design

Buildings and RoadwaysBuildings and Roadways



• Cluster buildings within the development envelope

• Design buildings with smaller footprints

• Roadways should follow existing grades.

• Use parking structures • Separate parking areas

Stormwater ManagementStormwater Management



• Minimize directly connected impervious area

• Create multiple sub-watersheds

• Increase time of concentration

• Use a “treatment train” of LID techniques to deal with frequent, low-intensity storms.

Municipal GIS ApplicationsMunicipal GIS ApplicationsWhat GIS assistance would local governments like to have from the State?

Among other things, an easily accessible clearing house entity that coordinates lists, locations, and links to the various GIS datasets, etc. that different groups within state government have produced.

Without such a source, local governments don’t know “what they don’t know”. That is, they don’t know what is available, or who has it.

URE

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