Services Directory - HAND_Model_Merged_Catchment

HAND_Model_Merged_Catchment_Areas (Map Service)

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Current Version: 10.81

Service Description:

Height Above Nearest Drainage (HAND)-based inundation modeling provides an approximation of flood inundation from the nearest water stream and is calculated across HUC6 watershed units. The models in this dataset were derived from historical precipitation and streamflow data to calculate average and maximum discharge events, and modeled additional precipitation amounts to account for potential increases due to climate change.

An existing issue with previous HAND models is that the catchments do not overflow into one another. If one catchment floods up to its catchment boundaries, there is no mechanism for the flooding to move across the boundary into the next catchment. This can appear in the mapped model output as a “wall” of water that does not correspond to any physical barrier. A process was developed to determine where flooding should spill over into adjacent catchments and merge the catchments together to allow the flooding to extend to its natural extent. This process is experimental and may not resolve every issue, but provided improved results. The map of “merge locations” shows catchments where merging occurred.

Map Name: HAND Model Merged Catchment Areas

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Layers:

HAND Model Merged Catchment Areas(0)

Tables:

Description:

Copyright Text: Rutgers University: Wang Hydro-environment Informatics Research Lab, NJAES Office of Research Analytics, Voorhees Transportation Center

Spatial Reference:
102100

Single Fused Map Cache: true

Capabilities: Map,TilesOnly,Tilemap

Tile Info:

Height: 256
Width: 256
DPI: 96
Levels of Detail: (# Levels: 24)

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Format: Mixed
Compression Quality: 75
Origin:
Spatial Reference:
102100

Initial Extent:

Full Extent:

Min Scale: 2311162.0
Max Scale: 1710.0

Min LOD: 8
Max LOD: 17

Units: esriMeters

Supported Image Format Types: Mixed

Export Tiles Allowed: false
Max Export Tiles Count: 100000

Document Info:

Title: HAND Model Merged Catchment Areas
Author: ljmarxen_rutgers
Comments:
Subject: Height Above Nearest Drainage (HAND)-based inundation modeling provides an approximation of flood inundation from the nearest water stream and is calculated across HUC6 watershed units. The models in this dataset were derived from historical precipitation and streamflow data to calculate average and maximum discharge events, and modeled additional precipitation amounts to account for potential increases due to climate change.
Category:
Keywords: NJADAPT, HAND, inland, riverine, flooding, gis, mapping, NJ, stream, river, rainfall, storm, inundation, merged, catchment