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

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The pathname may consist of up to 391 characters. It is, by convention, separatedinto six parts with a forward slash delimiter. Again, when accessing a block ofdata in a DSS file, the full data’s pathname (including optional parts if they weredefined at creation) must be given along with the header’s metadata, that is,beginning time, units of the data, and type of data stored in the internal header ofthe data’s block. By convention, each part in the pathname is referenced by theletters A, B, C, D, E, and F, which are delimited by a forward slash with the form:/A/B/C/D/E/F/.The pathname is used to describe the data in enough detail that variousapplication programs can write to and read data from HEC-DSS by “simply”knowing the pathname (USACE, 1995). A brief description of each pathname partfollows to provide the fundamentals for the integration of time series as crucialcomponent in Map2Map.Part A: A logical grouping name for all records (blocks) that belong to aspecific project or study (e.g., the name of the watershed case study). This part isoptional.Part B: Identifier of the geographic element that owns the time seriesrecords (site location of the data). For example the gage ID that provides ageoreferenced location to the data. This part is not optional.Part C: Variable type description (e.g., FLOW, PRECIP, STAGE, etc.).The user can define his own variable type descriptions or use the recommendedC-part names as listed in the user’s guide (USACE, 1995). This part is notoptional.82
Part E: Time Interval of stored data. It is a combination of an integernumber with an alphanumeric time interval. Valid data intervals are: 1MIN,2MIN, 3MIN, 4MIN, 5MIN, 10MIN, 15MIN, 20MIN, 30MIN, 1HOUR, 2HOUR,3HOUR, 4HOUR, 6HOUR, 8HOUR, 12HOUR, 1DAY, 1WEEK, 1MON, and1YEAR. This time interval indirectly defines the DSS block length and in turn theformat of the valid Part D as described next.Part D: Block start date or starting date of the data block. It must be a 9-character military style date for the start of the standard data block (notnecessarily the start of the first piece of data). Regardless of when the first validdata occurred, the block starting date is a constant standard value that depends onthe block’s length. This part is not optional. The length of the block determinesthe format of the starting date as shown below:If the block length is a century the starting date must be the beginning ofthat century: 01JAN1900 for a block length covering the 20 th century (regardlessof when the first valid data occurred). Used for yearly data intervals.If the block length is a decade, the starting date must be the beginning ofthat decade: 01JAN1960 for a block length covering the 1960’s. Used for weeklyand monthly data intervals.If the block length is a year, the starting date must be the beginning of thatyear: 01JAN1982 for a block length covering the 1982 year. Used for daily dataintervals.If the block length is a month, the starting date must be the beginning ofthat month: 01MAR1982 for a block length covering March. Used for 15MIN,83
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Table of ContentsList of Figures ..
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4.1.12 The XML2GDB Script Tool ....
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Figure 3.24 Components of a Steady
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Figure 4.50 Create Flood Inundation
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Chapter 1 Introduction1.1 BACKGROUN
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for undeveloped or natural conditio
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All the previous statements favor t
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science, and engineering models as
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Different approaches have been used
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generic and self-described formats,
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externally executed from a central
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though GIS-based, the system does n
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Geographic Information Systems, Arc
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By defining the three basic functio
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containing an inventory of damage s
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Data Models in charge of storing an
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Figure 3.1 Floodplain Modeling Sche
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either with Schematic Nodes (for Su
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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 and 52: 3.4.4 External Execution of HEC-RAS
Page 53 and 54: analysis. In particular, GIS has be
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: having different formats and that a
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
Page 107 and 108: The resulting runoff hydrograph is
Page 109 and 110: Thus, the time period for the entir
Page 111 and 112: After the ZSRTS subroutine is execu
Page 113 and 114: Figure 4.12 HMSCaller Model Compone
Page 115 and 116: ased on a process handle (a program
Page 117 and 118: These simple command line statement
Page 119 and 120: To programmatically accomplish this
Page 121 and 122: to provide the hydraulic input for
Page 123 and 124: 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
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Table 4.5: Time Interval Equivalenc
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There are not specific valid values
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catalog list. For the DSS2GDB appli
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4.1.9.1 Opening the HEC-DSS fileThe
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channel (the hydraulic representati
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the model if the new configuration
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the main program as a public module
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Then, the RASCaller application acc
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Figure 4.31 ProjectName Property in
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Figure 4.33 RunSteady Method in RAS
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Figure 4.34 ExportGIS Method in RAS
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data structures delivered by every
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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
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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
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Figure 4.55 Workflow for Extracting
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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
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process model in sequence. For the
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5.6 A TRUE SPATIAL APPROACHAutomate
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time series between NEXRAD, the HEC
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value of the entire runoff hydrogra
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case study. Bigger watersheds (abov
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The first step consists in installi
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3.7 Map2Map UsageAll of the model b
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Congratulations! You have successfu
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Once the simplified version of Arc
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cells that cover your study area an
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Second, the user needs to modify th
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Appendix BMap2Map CD Content1 CD Da
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o hmsproj - contains folders with H
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Goodchild, M.F., Steyaert, L.T., an
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Olsen R. J., Beling, P. A., Lambert
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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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