HEC-HMS Preprocessing Tool with Cloud-Based Data

Cynthia Castro - Jones & Carter

Transcript

1. HMS-PrePro A GIS Tool for Gathering Data and Preparing HEC-HMS Basins Cynthia V. Castro, PE, CFM TNRIS 10/27/2016
2. Outline •  Issues with HMS Modeling •  New GIS Data Services •  Development of HMS-PrePro •  Case Studies – Onion Creek Watershed – Goose Creek & Jackson Bayou – Bear Creek
3. MoPvaPon §  Bridge City, TX §  Hurricane Ike – 2008 §  14 of 3,400 Homes Inhabitable §  FEMA Flood Map – 1982
4. FEMA Maps FEMA analyzed the exisPng state of flood miPgaPon capabiliPes in the U.S. and recommended improving data-driven decisions through GIS-based technologies and systemaPc mapping (FEMA Strategic Plan 2014-2018).
5. Manual HMS Input Complex, Time-consuming, Expensive!
6. GIS Tools CRWR Pre-Pro (Olivera, 1998) WRAP Hydro (Gopalan, 2003) AGWA (EPA/USDA, 2002) HEC-GeoHMS (USACE, 2003) BASINS (EPA, 2001) Over 50 User-Steps Required (Errors) Manual Data Processing
7. HEC Geo-HMS §  Preprocessing §  Project Setup §  Obtain Data §  ArcHydro FDR, FAC §  Basin Processing §  Batch Points §  Calculate Slope §  Hand Select Outlets §  Longest Flowpath §  Basin Centroid §  CN Grid §  PrecipitaPon Grid §  Name Objects §  Convert Units §  Select HMS Process §  TR55 Parameters §  Hand-draw points §  Muskingum-Cunge §  User-input parameters §  KinemaPc Wave §  User-input parameters
8. USACE NoPce No@ce The HEC-GeoHMS downloads available from this webpage were tested, verified, and supported by HEC. HEC-GeoHMS Version 10.2 is the last version that was tested and verified to be funcPonal in ArcGIS 10.2.1 and is available from this webpage. HEC will no longer test and verify newer versions of HEC-GeoHMS that is compaPble with versions of ArcGIS that are newer than Version 10.2.1. Newer versions of HEC- GeoHMS have been made available from the ESRI FTP site; however, these newer versions have not been tested nor will they be supported by HEC. HEC is developing the necessary GIS capabiliPes directly within HEC-HMS. HEC-HMS Version 4.3 will contain the subbasin and stream delineaPon capabiliPes in HEC-GeoHMS 10.2, future versions of HEC- HMS will contain the GIS parameterizaPon features in HEC-GeoHMS 10.2. HEC-HMS Version 4.3 will be available in the Spring of 2017.
9. An Interim SoluPon HMS-PrePro is an ArcGIS toolbox that uses Python programming to extract cloud-based data, delineate watersheds, esPmate hydrological parameters, and summarize results in a HEC-HMS basin model.
10. Data Services COH GIMS
11. USGS NaPonal Map Viewer
12. Esri Living Atlas Provides users with access to geospa@al informa@on in a cloud- based environment, including common hydrological datasets. USGS DEM (3m, 10m, 30m, LiDAR) SSURGO Soils (HSG) NLCD Land Use & Pct. Impervious
13. HMS-PrePro Script Tools Get Data: •  Gather Cloud-Based or User-Defined Data •  Delineate Watershed (ArcHydro or NHDPlus) Run HMS-PrePro: •  Network Topology •  EsPmate Parameters – Aiributes Table (i.e. CN, Lag, Green-Ampt, Muskingum, Snyder, Clark) •  Produce HEC-HMS Basin Model
14. Get Data Tool
15. Run HMS-PrePro Tool •  An iniPal esPmate of hydrological parameters based on input data. •  Engineering judgment is required for iniPal constant values (i.e. Manning’s n). •  Further analysis, calibraPon, and site-specific updates are necessary for reliable results (similar to HEC Geo-HMS).
16. Example: Curve Number (USDA, 1986)
17. Example: Curve Number 1 – Lookup Table 2 – Reclassify Land Use 3 – Union Soils/LU 4 – Individual CN 5 – Composite CN = ​∑↑▒​↓ ​↓  /∑↑▒​↓   
18. Aiributes Table
19. Case Study: Onion Creek Watershed
20. FEMA EffecPve Model SCS Curve Number Snyder Unit Hydrograph Modified Puls + Muskingum-Cunge
21. HEC GeoHMS
22. HMS Pre-Pro
23. HEC GeoHMS HMS PrePro
24. Qp (cfs) V (in) FEMA 101,929 6.88 HEC GeoHMS 99,788 6.77 HMS-PrePro 99,871 6.76 HMS-PrePro HEC-GeoHMS FEMA HMS-PrePro & HEC-GeoHMS produce the same parameters. Es@mated model is similar to the calibrated model because hydrological methods and constants were able to be es@mated from a detailed study.
25. Jackson Bayou Goose Creek How do choices in model rou@ng effect ini@alized results compared with detailed engineering studies?
26. Jackson Bayou 0 2000 4000 6000 8000 10000 12000 14000 16000 6/1/2007 0:00 6/1/2007 12:00 6/2/2007 0:00 6/2/2007 12:00 6/3/2007 0:00 6/3/2007 12:00 100-yr Flow (cfs) AutoHMS HCFCD M3 EsPmated ounlow hydrograph is nearly idenPcal to the effecPve model. HMS-PrePro Effective
27. 0 2000 4000 6000 8000 10000 12000 14000 16000 6/1/2007 0:00 6/1/2007 12:00 6/2/2007 0:00 6/2/2007 12:00 6/3/2007 0:00 6/3/2007 12:00 100-yr Flow (cfs) AutoHMS HCFCD M3 IniPalized: Muskingum/Lag rouPng (parameter esPmates not calibrated) EffecPve: Modified Puls rouPng (requires detailed channel geometry + RAS model) Goose Creek HMS-PrePro Effective
28. Bear Creek
29. FEMA Effec@ve HMS-PrePro Automated watershed topology (basin geometry + connecPvity) compares well to a detailed study. Save @me with programming!
30. Bear Creek 0 10000 20000 30000 40000 50000 60000 70000 1/1/2001 2:24 1/1/2001 7:12 1/1/2001 12:00 1/1/2001 16:48 1/1/2001 21:36 1/2/2001 2:24 1/2/2001 7:12 1/2/2001 12:00 100-yr Flow (cfs) AutoHMS FEMA Eff Vol. = 21,776 AC-FT Vol. = 21,806 AC-FT ∆ 0.14 % Volumes are nearly idenPcal (basin losses are captured). HMS-PrePro Effective Shape is not maintained (rouPng does not capture flow aienuaPon). Detailed study is required for reliable results!
31. Conclusions •  Data services may be used in hydrologic models. – Seamless, authoritaPve, limited manual processing •  Python programming may be used to speed-up common or repePPve GIS tasks. •  Engineering judgement and calibraPon is necessary for accurate models.
32. Thank you! QuesPons? Contact informaPon: CCastro@jonescarter.com 346-231-0867