LFlow:LFlow:A Data Collection and Analysis Package to Support Low Streamflow Surveys
• Jamie Duncan• Hendrik Amo
• Frank Kenny• Steve Damaia• Mark Wooley (LRC)• Kent Todd
• Marc Hinton • Mark Peacock• Magdi Widaatalla• Jeff Moxley
• Chris Wilkinson• Jennifer Havelock
• Supports the follow initiatives and programs:– Water Budgets (Water Supply and Demand)– Water Permitting– Watershed Planning and Management– Great Lakes Scientific Studies
Why collect Low Flow data?
Source WaterProtection
WalkertonInquiry2002
Canada Ontario Agreement
2007
Great Lakes -St. Lawrence Basin Water Resources Compact
2005
Clean Water Act
2006
Low Flow Management provides data for analysisof our water resources; especially during dry periods when the demand is high.
Our Watersheds are characterized by a Non uniform distribution of stream flow
Spatially distribution of sampling provides a better understand of the interactions between surface Water and groundwater;
Current Monitoring distribution:Stream Flow Gauge Locations(WSC, Hydrology Monitoring Sites, Private)
STREAM FLOW SURVEYSTREAM FLOW SURVEY
Time
Economical and a Practical
Groundwater/surface water interactions• WATER BUDGET
Link between non-gauged and gauged sites
Produce additional measured andobservational data
STREAM FLOW SURVEY
LowLow--flow surveys are of considerable value to many flow surveys are of considerable value to many watershed specialist and managers interested in groundwater watershed specialist and managers interested in groundwater
and surface water resources, aquatic habitat, water quality and surface water resources, aquatic habitat, water quality and land use issues.and land use issues.
• In 2005, Marc Hinton published his methodology for low stream flow surveying.
• Methods for stream measurement, error assessment, spatial data analysis, etc.
GSC Low Stream flow MethodsGSC Low Stream flow Methods
Field Data Collection Data Entry Local Analysis
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• Reconnaissance and Low-flow surveys to obtain source data
• Data import or manual entry
• Review and confirm data
Data Distribution
Field Technician
XML Data Inter-change
LocalMS-Access
ESRI ArcGIS 9.2
Data Technician
11,22,33,444,55,66,77,88,99
and/or
GIS
Technician
Researcher/Analyst
CorporateLFlow
Database
• Local assessment of flows and standard map production
• Regional assessment of flows and standard map production
Regional Analysis
• Inter-change of data to corporate level
Data Refresh
Data Technician
ArcHydroData
Reconnaissance SurveyLow Flow survey requires measurements at numerous sites over a short period.
Therefore, it is recommended to conduct a preliminary survey or Reconnaissance survey to ensure that the survey is planned and conducted effectively and efficiently.
Reconnaissance Survey
A well designed survey will:
•Identify suitable locations and methods for stream gauging
•Preliminary identification of high and low discharge areas
•Provide info on the flowing length of streams and elevation where stream flow is initiated
•Identify activities or problems that may influence stream gaugingor interpretation of the low-flow results
•Provide an opportunity to obtain permission to access sites on private lands
•Greatly improve the familiarity with the hydrological conditions of the watershed
•Development on an early conceptual understanding of low-flow in a watershed
Utilize your GIS resources
Nested Approach•Overlapping surveys
•Plan in advance
•Watershed and Sub-watershed level
•Support long term monitoring
Measuring StreamflowTwo methods of collecting Low Flow Data
1. Current meter (or Velocity-area)
2. Volumetric Method
VelocityVelocity--AreaArea
Volumetric Volumetric MethodMethod
Field Data Collection Data Entry Local Analysis
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• Reconnaissance and Low-flow surveys to obtain source data
• Data import or manual entry
• Review and confirm data
Data Distribution
Field Technician
XML Data Inter-change
LocalMS-Access
ESRI ArcGIS 9.2
Data Technician
11,22,33,444,55,66,77,88,99
and/or
GIS
Technician
Researcher/Analyst
CorporateLFlow
Database
• Local assessment of flows and standard map production
• Regional assessment of flows and standard map production
Regional Analysis
• Inter-change of data to corporate level
Data Refresh
Data Technician
ArcHydroData
LFlow:
Purpose• To create a standard data model and set of spatial tools
that allow low streamflow data to be managed, stored and analyzed in correspondence with the GSC protocol.
Scope• Spatial and tabular data models• Database application for data entry• GIS tools for analysis and mapping of low streamflow data• Mechanism for regional data distribution• Leverage existing GIS hydrology data models
• The Lflow Data Architecture• Arc Hydro Data Model and Tools• MS-Access Lflow Interface• ESRI ArcMap Lflow Tools
The Core Componentsof Lflow
Lflow Data Model
Drainage
Hydrographic Points
Drainage Area
Hydrography
Channels
Terrain
Rainfall
Orthophotography
Arc Hydro
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Arc HydroNetwork
HydroJunctions
DrainagePoints
Arc Hydro cont…Automated Catchment, DrainageLine and DrainagePoint,
HydroJunction Generation in Arc Hydro
MS-Access Interface
ArcMap 9.2 Tools
Toronto Region Cons. Auth.
ArcGIS 9.2 Tools• Series of standard low stream-flow maps can be
automatically generated (Net Low Flow, Discharge per Unit Area, Net Discharge per Unit Length, and, Proportion of Net Discharge)
It is recommended to read the entire manual first before using Lflow.
Creating New Sites or Updating Site Information in Lflow Access:
Create or select low flow survey MonitoringPoints in your ArcHydro session. Export MonitoringPoints to Sites.
Import sites into Lflow Access. Populate remaining information for site.
Designing a Low Streamflow Survey:
In Lflow Access open the Survey Wizard and setup survey. Print survey plan report. Export survey plan for mapping.
Import survey plan using Lflow in ArcMap. Map survey plan.
Conduct low flow survey in field and collect raw information. Input this information into Lflow Access.
Use the Analysis Wizard in Lflow Access to perform basic analysis. Export analysis results for mapping.
Import analysis results using Lflow in ArcMap.
Map analysis discharge results using Lflow mapping tools in ArcMap.
LFlow “News” and available for download:
Prototyping a PDA database solution for field data collection to allow syncing of field data to Lflow database.
-------------------------------------------------------------•Version 1.3
•Course Lectures (self-extracting EXE)•Course Modules (2 self-extracting EXE for Access2003 and Access 2007)•Lflow Software Install(1 self-extracting EXE containing required components for Access2003/2007,ArcMap9.1/9.2 and user manual)•Lflow Architecture(1 self-extracting EXE with Lflow architecture)
Lflow plans for ‘09
• Second session Training of Conservation Authority staff May ’09?
• Additional Testing during the 2009 field season.• Further development of Hand Held technology.• Work towards centralizing low flow data as a provincial
data set (coordinating with OSAP).
• Information and Application available @ CO website
FYI – if there is any historical data collected, WRIP will assist in placing the data into the LFlow App.
Kent ToddWRIP Team LeaderWater Resources Information Program (WRIP)Ministry of Natural Resources300 Water St., 2nd Flr, NorthPeterborough ON K9J 8M5ph: (705) 755-5023 fax: (705) 755-2184email: [email protected]
Craig OnafrychukData AnalystWater Resources Information Program (WRIP)Ministry of Natural Resources300 Water St., 2nd Flr, NorthPeterborough ON K9J 8M5ph: (705) 755-2384 fax: (705) 755-2184email: [email protected]
Contact WRIP for any Lflow support or to report any software bugs: