Converting a NEXRAD Rainfall Map into a Flood Inundation Map by ...

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ArcGIS ModelBuilder. Thus, the integration of the two external models is donethrough Arc Hydro and implemented under a GIS programming environmentmeant for connecting only GIS geoprocesses but here extended as a hybridconnection of standard GIS geoprocesses and user defined script tools forexecuting non GIS related tasks.By putting all of these integrating components together, the developedsystem for the linkage process can take an arbitrary HMS or HEC-1 modelsimulation and use it to drive the computation of water surface elevations under ageographically connected framework. The conceptual schematic of thisconceptual integration is shown in Figure 3.9.Figure 3.9 Simulation Models Integrated Through Arc Hydro3.5.1 The Hosting Geographic EnvironmentDifferent levels of developments have been accomplished so far that useGeographic Information Systems (GIS) as a tool for water resources research and42
analysis. In particular, GIS has been used to create databases of spatialinformation, to explore spatial relationships between related elements, and toexploit those spatial relationships to perform three main tasks: spatialparameterizations, data models for water resources, and integrated modelingenvironments for water resources.The developed GIS-embedded integration for hydrology and hydraulics isherein called the Map2Map application and was built as a modular system (not asingle monolithic program) that utilizes separately compiled subprograms (in theform of DLLs) referenced by Script files in charge of simple tasks (like passingarguments and performing calls to the DLLs) that can be loaded as components inthe new visual programming environment for batch processing of ArcGIS 9, theModel Builder. By using the ModelBuilder as the gluing workflow model, standaloneengineering models can now be incorporated as tools inside theModelBuilder framework and combined with other customized and standard toolsto accomplish complex tasks.In broad sense, the application consists of a main hosting platform, theModel Builder (visual environment for building spatial models in GIS), and manyindependently compiled subprograms as well as standard GIS tools, linkedtogether to form one single executable run-unit for the transformation of rainfallmaps to floodplain maps.ModelBuilder can be defined as a visual environment for assemblingworkflow models of geoprocessing tasks. It allows the creation of geoprocessingmodels made up of organized, compatible and connected individual tasks43
Page 3 and 4: Table of ContentsList of Figures ..
Page 5 and 6: 4.1.12 The XML2GDB Script Tool ....
Page 7 and 8: Figure 3.24 Components of a Steady
Page 9 and 10: Figure 4.50 Create Flood Inundation
Page 11 and 12: Chapter 1 Introduction1.1 BACKGROUN
Page 13 and 14: for undeveloped or natural conditio
Page 15 and 16: All the previous statements favor t
Page 17 and 18: science, and engineering models as
Page 19 and 20: Different approaches have been used
Page 21 and 22: generic and self-described formats,
Page 23 and 24: externally executed from a central
Page 25 and 26: though GIS-based, the system does n
Page 27 and 28: Geographic Information Systems, Arc
Page 29 and 30: By defining the three basic functio
Page 31 and 32: containing an inventory of damage s
Page 33 and 34: Data Models in charge of storing an
Page 35 and 36: Figure 3.1 Floodplain Modeling Sche
Page 37 and 38: either with Schematic Nodes (for Su
Page 39 and 40: channel cross sections, available H
Page 41 and 42: sequential data, called pathnames,
Page 43 and 44: Figure 3.5 NEXRAD square cells (873
Page 45 and 46: geodatabase formatted with the Arc
Page 47 and 48: The CrossSection feature class in A
Page 49 and 50: geodatabase (under Arc Hydro format
Page 51: 3.4.4 External Execution of HEC-RAS
Page 55 and 56: 3.5.3 Model-Specific ElementsA geog
Page 57 and 58: Figure 3.11 Geographic and Hydrolog
Page 59 and 60: For HEC-RAS, the connectivity is ac
Page 61 and 62: cross sections in the hydraulic mod
Page 63 and 64: Section line for a RAS cross-sectio
Page 65 and 66: from the geodatabase back into the
Page 67 and 68: Figure 3.19 Relationship Classes fo
Page 69 and 70: Figure 3.20 DSS Time Series content
Page 71 and 72: Figure 3.22 Extended Time Series Co
Page 73 and 74: Figure 3.23 Creating a Flow File fr
Page 75 and 76: etween the HEC-DSS file system and
Page 77 and 78: The more specific steps for the pos
Page 79 and 80: Chapter 4 Map2Map Components4.1 MOD
Page 81 and 82: A subset of NEXRAD time series data
Page 83 and 84: A folder location is also provided
Page 85 and 86: Figure 4.4 Radar2GDB Model Componen
Page 87 and 88: ecords. Figure 4.6 illustrates the
Page 89 and 90: Figure 4.8 Time Series Tables and R
Page 91 and 92: having different formats and that a
Page 93 and 94: Part E: Time Interval of stored dat
Page 95 and 96: execution time and for their corres
Page 97 and 98: on the steps needed to transfer the
Page 99 and 100: Len_sBTime (I): The length of the s
Page 101 and 102: 52: Invalid precision exponent spec
Page 103 and 104:
methods: user hyetograph, user gage
Page 105 and 106:
Once the hyetograph is defined (for
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The resulting runoff hydrograph is
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Thus, the time period for the entir
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After the ZSRTS subroutine is execu
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Figure 4.12 HMSCaller Model Compone
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ased on a process handle (a program
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These simple command line statement
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To programmatically accomplish this
Page 121 and 122:
to provide the hydraulic input for
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information into the extended Arc H
Page 125 and 126:
The HydroJunction, used for connect
Page 127 and 128:
Once the identification of flow cha
Page 129 and 130:
As with the GDB2HMSDSS, the first t
Page 131 and 132:
4.1.7 Time Series ExtractionOnce th
Page 133 and 134:
accomplish this have been developed
Page 135 and 136:
straight forward for all time stamp
Page 137 and 138:
As opposed to HEC-DSS, the Arc Hydr
Page 139 and 140:
Table 4.4: Variable Type Equivalenc
Page 141 and 142:
ZCAT DSS subroutines) and stored in
Page 143 and 144:
Table 4.5: Time Interval Equivalenc
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There are not specific valid values
Page 147 and 148:
catalog list. For the DSS2GDB appli
Page 149 and 150:
4.1.9.1 Opening the HEC-DSS fileThe
Page 151 and 152:
channel (the hydraulic representati
Page 153 and 154:
the model if the new configuration
Page 155 and 156:
the main program as a public module
Page 157 and 158:
Then, the RASCaller application acc
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Figure 4.31 ProjectName Property in
Page 161 and 162:
Figure 4.33 RunSteady Method in RAS
Page 163 and 164:
Figure 4.34 ExportGIS Method in RAS
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data structures delivered by every
Page 167 and 168:
The two most well-known models for
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The water surface elevations obtain
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Once the water surface elevations f
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Generate a suitable water surface m
Page 175 and 176:
Figure 4.42 2 Foot-Contour Lines fo
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Figure 4.43 Rosillo Creek’s terra
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standard ArcGIS tool), is used in M
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By doing this, the water surface el
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Figure 4.49 Create Flood Polygon Mo
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Int OperationThe Integer operation
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case that was developed for Map2Map
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contours (isohyetals) or by interpo
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design storm input given its possib
Page 193 and 194:
Figure 4.55 Workflow for Extracting
Page 195 and 196:
for it. Finally, the DigitalStorm2H
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model for water resources (Maidment
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Hydro, the HydroJunctionHasCrossSec
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involved in the transformation of r
Page 203 and 204:
process model in sequence. For the
Page 205 and 206:
5.6 A TRUE SPATIAL APPROACHAutomate
Page 207 and 208:
time series between NEXRAD, the HEC
Page 209 and 210:
value of the entire runoff hydrogra
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case study. Bigger watersheds (abov
Page 213 and 214:
The first step consists in installi
Page 215 and 216:
3.7 Map2Map UsageAll of the model b
Page 217 and 218:
Congratulations! You have successfu
Page 219 and 220:
Once the simplified version of Arc
Page 221 and 222:
cells that cover your study area an
Page 223 and 224:
Second, the user needs to modify th
Page 225 and 226:
Appendix BMap2Map CD Content1 CD Da
Page 227 and 228:
o hmsproj - contains folders with H
Page 229 and 230:
Goodchild, M.F., Steyaert, L.T., an
Page 231 and 232:
Olsen R. J., Beling, P. A., Lambert
Page 233 and 234:
Werner, M. G. F. 2001. Impact of gr
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Converting a NEXRAD Rainfall Map into a Flood Inundation Map by ...

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