General Information

Project area general description

The five largest islands of Hawaii

Are any areas excluded?

No

Types of flow statistics available

Peak flows (flood frequencies)

ArcGIS version used for processing

9.3

Was TopoGrid used to process DEMs?

No

DEM and derivatives projection (general description)

UTM Zone 4, North American Datum of 1983, vertical datum NAVD 88

DEM and derivatives (fdr, fac, etc.) resolution

10 m

DEM source

One-third-arc-second NED, 09/2006, http://ned.usgs.gov/

Hydrography source

National Hydrography Dataset (NHD) - High-resolution, 05/2008, http://nhd.usgs.gov/

Hydrologic unit "walls" source

not used

Gage basin boundaries source

Selected boundaries for basins above USGS stream gages, Unpublished written communications -- Delwyn Oki, 07/2009

Interactive map snapping tolerance

3 cells

Basin characteristics computed using continuous parameter grids (CPGs). CPGs improve web-site performance and are precomputed for every grid cell. Due to accumulated numeric rounding, the results may differ slightly from standard non-CPG computations. Non-CPG computations are used for edited basins.

BSLDEM10M, ELEV, I60M2Y, I06H2Y, I24H2Y, I48H2Y, I60M5Y, I06H5Y, I24H5Y, I48H5Y, I60M10Y, I06H10Y, I24H10Y, I48H10Y, I60M25Y, I06H25Y, I24H25Y, I48H25Y, I60M50Y, I06H50Y, I24H50Y, I48H50Y, I60M100Y, I06H100Y, I24H100Y, I48H100Y, I60M500Y, I06H500Y, I24H500Y, I48H500Y, NLCD012122, NLCD01_23, NLCD01_24, NLCD01_31, NLCD01_42, NLCD01_82, PRECIP, SLOP30_10M

 

Basin Characteristics Methods and Sources

Name

Description

Computation method

Data source

BSLDEM10M

Mean basin slope computed from 10 m DEM, in percent

area-weighted mean

wshslopepct, http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

CENTROIDY

Y coordinate of the centroid in map coordinates

computed by ArcGIS

delineated basin

COMPRAT

Compactness ratio, dimensionless

PERIMMI / (2*(3.14159*DRNAREA)^0.5)

computed

CSL1085LFP

10-85 slope in feet per mile based on longest flow path

ArcHydro Tools LFPathOp

Hydro-enforced DEM  derivatives (fdr and dem), http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

DRNAREA

Drainage area in square miles

polygon area

delineated basin

ELEV

Mean Basin Elevation in feet

area-weighted mean

dem, http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

ELEV10FT

Elevation at 10 percent from outlet along Longest flow path in feet, using DEM

ArcHydro Tools LFPathOp

Hydro-enforced DEM  derivatives (fdr and dem), http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

ELEV10FT3D

Elevation at 10 percent from outlet along Longest flow path in feet, using 3D line

ArcHydro Tools LFPathOp

Hydro-enforced DEM  derivatives (fdr and dem), http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

ELEV85FT

Elevation at 85 percent from outlet along Longest flow path in feet, using DEM

ArcHydro Tools LFPathOp

Hydro-enforced DEM  derivatives (fdr and dem), http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

ELEV85FT3D

Elevation at 85 percent from outlet along Longest flow path in feet, using 3D line

ArcHydro Tools LFPathOp

Hydro-enforced DEM  derivatives (fdr and dem), http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

ELEVMAX

Maximum Basin Elevation in feet

maximum

dem, http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

I06H100Y

6 Hour 100 Year Precipitation in inches

area-weighted mean

hi100yr06ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I06H10Y

6 Hour 10 Year Precipitation in inches

area-weighted mean

hi10yr06ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I06H25Y

6 Hour 25 Year Precipitation in inches

area-weighted mean

hi25yr06ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I06H2Y

6 Hour 2 Year Precipitation in inches

area-weighted mean

hi2yr06ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I06H500Y

6 Hour 500 Year Precipitation in inches

area-weighted mean

hi500yr06ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I06H50Y

6 Hour 50 Year Precipitation in inches

area-weighted mean

hi50yr06ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I06H5Y

6 Hour 5 Year Precipitation in inches

area-weighted mean

hi5yr06ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I24H100Y

24 Hour 100 Year Precipitation in inches

area-weighted mean

hi100yr24ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I24H10Y

24 Hour 10 Year Precipitation in inches

area-weighted mean

hi10yr24ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I24H25Y

24 Hour 25 Year Precipitation in inches

area-weighted mean

hi25yr24ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I24H2Y

24 Hour 2 Year Precipitation in inches

area-weighted mean

hi2yr24ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I24H500Y

24 Hour 500 Year Precipitation in inches

area-weighted mean

hi500yr24ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I24H50Y

24 Hour 50 Year Precipitation in inches

area-weighted mean

hi25yr24ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I24H5Y

24 Hour 5 Year Precipitation in inches

area-weighted mean

hi5yr24ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I48H100Y

48 Hour 100 Year Precipitation in inches

area-weighted mean

hi100yr48ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I48H10Y

48 Hour 10 Year Precipitation in inches

area-weighted mean

hi10yr48ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I48H25Y

48 Hour 25 Year Precipitation in inches

area-weighted mean

hi25yr48ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I48H2Y

48 Hour 2 Year Precipitation in inches

area-weighted mean

hi2yr48ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I48H500Y

48 Hour 500 Year Precipitation in inches

area-weighted mean

hi500yr48ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I48H50Y

48 Hour 50 Year Precipitation in inches

area-weighted mean

hi50yr48ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I48H5Y

48 Hour 5 Year Precipitation in inches

area-weighted mean

hi5yr48ha, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I60M100Y

60 Minute 100 Year Precipitation in inches

area-weighted mean

hi100yr60ma, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I60M10Y

60 Minute 10 Year Precipitation in inches

area-weighted mean

hi10yr60ma, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I60M25Y

60 Minute 25 Year Precipitation in inches

area-weighted mean

hi25yr60ma, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I60M2Y

60 Minute 2 Year Precipitation in inches

area-weighted mean

hi2yr60ma, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I60M500Y

60 Minute 500 Year Precipitation in inches

area-weighted mean

hi500yr60ma, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I60M50Y

60 Minute 50 Year Precipitation in inches

area-weighted mean

hi50yr60ma, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

I60M5Y

60 Minute 5 Year Precipitation in inches

area-weighted mean

hi5yr60ma, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

IMPNLCD01

Percentage of impervious area determined from NLCD 2001 impervious dataset

percentage of area

impnlcd01, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

LFPLENGTH

Length of associated Longest Flow Path in miles

ArcHydro Tools LFPathOp

Hydro-enforced DEM  derivatives (fdr and dem), http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

MINBELEV

Minimum Basin Elevation in feet

minimum

dem, http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

NLCD01_23

Medium Intensity Developed Land from NLCD2001, in percent of basin area

percentage of area

nlcd01_23, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

NLCD01_24

High Intensity Developed Land from NLCD2001, in percent of basin area

percentage of area

nlcd01_24, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

NLCD01_31

Barren Land from NLCD2001, in percent of basin area

percentage of area

nlcd01_31, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

NLCD01_42

Evergreen Forest Land from NLCD2001, in percent of basin area

percentage of area

nlcd01_42, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

NLCD01_82

Cultivated Crop Land from NLCD2001, in percent of basin area

percentage of area

nlcd01_82, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

NLCD012122

Developed Open Space and Low Intensity Developed Land from NLCD2001, in percent of basin area

percentage of area

nlcd012122, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

PERIMMI

Perimeter in miles

computed by ArcGIS

delineated basin

PERM12IN

Area-weighted mean soil permeability (top 12 inches), in inches per hour (NRCS SSURGO database)

area-weighted mean

perm12in, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

PERM24IN

Area-weighted mean soil permeability (top 24 inches), in inches per hour (NRCS SSURGO database)

area-weighted mean

perm24in, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

PRECIP

Mean Annual Precipitation in inches

area-weighted mean

precip_1k_in, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

RELIEF

Maximum - minimum elevation, in feet

ArcHydro Tools COMPMETHOD=RANGE

computed

RELRELFFM

Relative relief in feet per mile

RELIEF/PERIMMI

computed

SLOP30_10M

Percent of area having slope greater than or equal to 30 percent, as measured from 10-m DEM

percentage of area

wshslopege30, http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

SLPFM3D

Longest flow path slope in feet per miles using 3D Line

ArcHydro Tools LFPathOp

Hydro-enforced DEM  derivatives (fdr and dem), http://water.usgs.gov/lookup/getspatial?ds680_archydrohucs

URBNLCD01

Percentage of urban land cover determined from NLCD 2001 land cover dataset

percentage of area

urbnlcd01, http://water.usgs.gov/lookup/getspatial?ds680_statewidelayers

The Hawaii StreamStats introductory page here has additional information regarding the application, including links to reports, cooperators, and other explanatory information.