Managing Water Resources Data with HEC-DSSVue

Learn about managing gridded data in HEC-DSSVue, including how grids represent spatial data, storing data in DSS, naming conventions, tools for manipulation, and more. Explore the importance of grids in hydrologic modeling and the application of spatial data in HEC-HMS and HEC-RAS.

• Water Resources
• Data Management
• HEC-DSSVue
• Gridded Data
• Hydrologic Modeling

deirdre Follow

Uploaded on Apr 06, 2024 | 4 Views

Download Presentation

Please find below an Image/Link to download the presentation.

The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.

Presentation Transcript

1. Water Resources Data Management with HEC-DSSVue Managing HEC-DSS Gridded Data

2. ObjectivesThis lecture should teach you How grids represent spatially distributed data Sources of gridded data How DSS stores data in grids Organization of grid data in DSS records Naming conventions for grids What tools are available for loading, viewing, and manipulating DSS grid data

3. Topics Why are there grids in DSS? NEXRAD radar and the modClark rainfall-runoff method The SHG grid indexing systems Storing grids in DSS Gory Details Naming Conventions The Grid Data toolkit Loading Grids Displaying grids Grouping grids into time series Calculating with grids

4. Gridded Meteorological Products 1990 2015 2020 1995 2005 2010 2000

5. Why are there grids in DSS?

6. Why are there grids in DSS? Reliable precipitation estimates are crucial to flood hydrograph analysis NEXRAD radar offers a potential for improvement over basin-average precipitation estimates from rain gages Use of grid methods for hydrologic modeling DSS should support data types used for hydrologic analysis and forecasting

7. Application of Spatial Data The inclusion of spatially distributed modeling methods in HEC-HMS and HEC-RAS require spatially distributed boundary conditions.

8. The Standard Hydrologic Grid (SHG) Based on USGS National Atlas Spatial Reference System (EPSG:5070) https://www.spatialreference.org/ref/sr-org/epsg-5070/html/ Albers Equal-Area Projection (handy for calculating volumes from depths) More commonly used for natural resource data than HRAP s polar stereographic Supports variable resolution (10, 20, 50 10km) Has a fixed size and positions of cells Still limited to 48-state applications Very little time-varying data natively in SHG

9. Standard Hydrologic Grid (SHG) SHG locations identified by cell indices For a given cell size, an index pair always refers to the same location Cell row and column numbers start at the origin of the coordinate system, so it s easy to convert cell numbers to northing and easting

10. Features for Grids in HEC-DSS Internally, DSS grid records contain Full coordinate system definition Position of row, column origin Interfaces to support SHG- like Grids based on UTM coordinates UTM Discretization in HEC- HMS Load UTM grids from various formats Interpolate UTM grids with HEC-HMS and HEC-MetVue UTM 39S Madagascar

11. Gridded Precipitation and Temperature Data Sources RFC River Forecast Center http://water.weather.gov/ahps/rfc/rfc.php https://www.hec.usace.army.mil/confluence/hmsdocs/hmsguides/en semble-analysis-simulations-in-hec-hms/applying-the-ensemble- compute-to-flood-forecasting Cumulus - https://cumulus.corps.cloud/ NCEP National Center for Environmental Predictions http://nomads.ncep.noaa.gov/

12. NDFD Precipitation Forecast (QPF)

13. Example SNODAS grids from NOHRSC NOAA National Operational Hydrologic Remote Sensing Center (NOHRSC) SNOw Data Assimilation System (SNODAS) SWE Dept h Melt Cold Content

14. Gridded Data Sources https://www.hec.usace.army.mil/confluence/hmsdocs/hmsguides/working-with- gridded-boundary-condition-data/gridded-data-sources

15. Storing Grids in DSS

16. Time Series Data Organization in DSS Header Units Data type Time offset (for Regular Time Series) Data Array Values Values & times (For Irregular Time Series) Array 90 3 3 3 40 120 140 190 Time Series

17. Grid Data Organization in DSS Header Units Data type Time (start & end) Location Data Array Values Like a regular time series, but at regular intervals in space Array 1 2 3 4 5 6 7 8 9 Equivalent grid, array by rows from lower left cell 7 8 9 4 5 6 1 2 3

18. DSS Grid Header Contents (Highlights) Cell Size (in meters) Origin cell indices Number of columns Number of rows Coordinate system Position of origin cell Start time End time Data units Data type Data Statistics Data Compression method

19. Identifying a Grid by Pathname Parts A Part: Grid System (HRAP, SHG, UTM32S) B Part: Location C Part: Parameter (Precip, Temp) D Part: Start time E Part: End time F Part: Version (ABRFC, White River) (17JAN1996:0300) (17JAN1996:0400) (StageIII, model) Reference for C Part pathname for HEC-HMS - https://www.hec.usace.army.mil/confluence/hmsdocs /hmsum/4.11/shared-component-data/grid-data

20. Precipitation Grids in DSS Parameter (C part): PRECIPITATION Units: mm Data Type: PER-CUM (Period Cumulative) Time Reference: UTC (Not local time)

21. Examples Daily precipitation and temperature products from PRISM Hourly MRMS Forecast results NBM NAM

22. Grid Tools for DSS

23. Grid Tools in DSS CWMS/HEC-RTS CAVI displays grids in sequence HEC-MetVue for Grid Display/Editing/Analysis, and Automated Processing. HEC-HMS for importing, processing, and creating HEC-DSSVue displays grids and metadata Methods available for scripting in DSSVue Extract sub-regions Mosaic grids together Simple math

24. DSS Grids in HEC Software A gridset is a sequence of grids Specified by Source file name or wildcard Pathname parts (A, B, C, F) Time step (difference between D & E parts) Allows many grid records to be managed as a single entity

25. Gridset Editor from CAVI

26. Grid Display in CAVI

27. CAVI Time Window and Animation Controls User-selected time window Sequence play (pseudo-animation) VCR-like controls

28. Grid Display in MetVue

29. DSS Grid Selector in HEC-MetVue

30. DSS Grid Selector in HEC-HMS

31. HEC-HMS Gridded Data Importer Purpose Streamline the process of converting various gridded dataset formats to HEC-DSS format for use within HEC-HMS. Supported Dataset Formats netCDF, HDF, GRIB, ASC, TIF, BIL, SNODAS, DSS Additional Features Project gridded data to SHG or UTM projections Clip to watershed boundary Set correct data units and type Examples provided - https://www.hec.usace.army.mil/confluence/hmsdocs /hmsguides/working-with-gridded-boundary- condition-data

32. HEC-HMS Gridded Data Importer

33. HEC-HMS Gridded Data Importer Clip data to project extent Set projection Set target cell size Specify resampling method

34. HEC-HMS Gridded Data Importer Specify destination file and file path

35. HEC-HMS Gridded Data Tools Manipulate gridsets o Calculator (scale or convert data units) o Clipper (clip to watershed to reduce file size) o Grid to Point (compute subbasin time- series) o Normalizer (adjust one gridset to totals from another) o Sanitizer (remove unwanted data values) o Shifter (shift in time)

36. HEC-HMS Grid Interpolation Interpolation option creates gridded datasets using gage data and discretization defined in the basin model Interpolation methods: o Inverse distance o Inverse distance squared o Nearest neighbor o Bilinear Adjustment options: o Bias o Lapse rate

37. Basin Averaging from Grids in MetVue

38. Cataloging Grid Records in DssVue

39. Grid Display in HEC-DssVue

40. GridInfo (basic metadata)

41. Detailed GridInfo (complete metadata)

42. Any Questions or Discussion?