Sub-watersheds for use in the Cross Acceptance process are based on the NJDEP HUC14 data set. A description of this data set can be found at: http://www.state.nj.us/dep/gis/stateshp2.html#HUC14. The first step in creating the cross acceptance layer was to code the HUC14 sub-watershed polygons with some additional attributes. The HUC14 layer was merged with the 1995/97 LU/LC layer so that the mean impervious surface percent of each HUC14 basin could be calculated. The LU/LC layer includes an estimate of the impervious surface percentage of each polygon mapped in that layer. Using this value, a mean impervious surface percentage could be calculated for each sub-watershed mapped in the HUC14 layer. Once the mean value was calculated, all HUC14 basins with a value of less than 10%, could be identified, and coded as such. HUC14 basins were also analyzed to identify those that drained to water supply intake points, those that contained existing C1 water features and those that were identified as providing natural drainage to selected water supply reservoirs. For the first, an existing NJDEP data layer showing water supply intakes was merged with the above HUC14 layer, and all sub-watersheds draining to a subset of mapped surface water intake points were identified and coded. The intakes subset included those intakes that supplied water from natural drainage only. It is to be noted that all HUC14 sub-watersheds above the location of the selected intake points, i.e., all upstream watersheds, were identified as a water supply watershed. To identify sub-watersheds containing Category One (C1) waters, a NJDEP layer with existing C1 waters was merged with the sub-watershed layer from the above analysis. This C1 layer is described at: http://www.nj.gov/dep/cleanwater/c1.html. Sub-watersheds containing a C1 water feature were identified and coded as such. For C1 coding, note that only the sub-watershed containing the C1 feature was coded for C1 status. Those sub-watersheds containing natural drainage to selected reservoirs were also identified and coded. The natural drainage layer was created by NJDEP to supplement the C1 and water intake layers. Although a separate attribute, all watersheds coded as having natural drainage for the selected reservoirs also are, in fact, coded for the water supply intake or C1 attributes. The sub-watersheds with the natural reservoir drainage were identified in a process similar to that described above for the other watershed attributes. Sub-watersheds that had either an impervious surface less than 10%, that drained to water supply intake points, that contained C1 waters, or had natural drainage to selected reservoirs, or any combination of these factors, are considered critical sub-watersheds. A particular basin may have more than one of the above characteristics, but only needed a positive in one of the four categories to be considered for further analysis. Sub-watersheds without any of these characteristics were not included in any further analysis. Once the sub-watershed layer was coded, and all critical sub-watersheds identified, the layer underwent an additional analysis step. The critical sub-watersheds identified in the above steps were merged with the developed lands layer selected from the 1995/97 LU/LC dataset. All those portions of the critical sub-watersheds that were undeveloped could then be identified, and selected for inclusion in the final layer. Those watershed portions that were developed, or built up, were eliminated from further consideration.
Created for Cross-Acceptance project
Contact John Tyrawski (609-777-0151) with any questions regarding the cross-acceptance data.
publication date
New Jersey Department of Environmental Protection (NJDEP) Data Distribution Agreement I. Description of Data to be Provided. The data provided herein are distributed subject to the following conditions and restrictions. SUBJECT DATA LAYERS For all data contained herein, NJDEP makes no representations of any kind, including, but not limited to, the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the digital data layers furnished hereunder. NJDEP assumes no responsibility to maintain them in any manner or form. II. Terms of Agreement 1. Digital data received from the NJDEP are to be used solely for internal purposes in the conduct of daily affairs. 2. The data are provided, as is, without warranty of any kind and the user is responsible for understanding the accuracy limitations of all digital data layers provided herein, as documented in the accompanying cross-reference files (see Section 1.14 CROSS-REFERENCE). Any reproduction or manipulation of the above data must ensure that the coordinate reference system remains intact. 3. Digital data received from the NJDEP may not be reproduced or redistributed for use by anyone without first obtaining written permission from the NJDEP. This clause is not intended to restrict distribution of printed mapped information produced from the digital data. 4. Any maps, publications, reports, or other documents produced as a result of this project that utilize NJDEP digital data will credit the NJDEP's Geographic Information System (GIS) as the source of the data with the following credit/disclaimer: "This (map/publication/report) was developed using New Jersey Department of Environmental Protection Geographic Information System digital data, but this secondary product has not been verified by NJDEP and is not state-authorized." 5. Users shall require any independent contractor, hired to undertake work that will utilize digital data obtained from the NJDEP, to agree not to use, reproduce, or redistribute NJDEP GIS data for any purpose other than the specified contractual work. All copies of NJDEP GIS data utilized by an independent contractor will be required to be returned to the original user at the close of such contractual work. Users hereby agree to abide by the use and reproduction conditions specified above and agree to hold any independent contractor to the same terms. By using data provided herein, the user acknowledges that terms and conditions have been read and that the user is bound by these criteria.
P.O. Box 427
Contact with questions regarding the "original" HUC14 data. Contact John Tyrawski (609-777-0151) with any questions regarding the cross-acceptance data.
Attributes were verified against various sources, including USGS huc14 coverage and NJPDES data.
The dephuc14 has been reassembled from the USGS HUC14 coverage. The HUC14 hydrologic unit boundaries, not including the state boundary, were delineated by the USGS from 1:24000 scale (7.5 minute) USGS topoquads. This data is not field checked and has no guarantees as to its accuracy. The minmum polygon size has not been defined, but the 14-digit hydrologic units have a defined minimum size of 3000 acres. Some basins are smaller, which gives a reasonable geographic arrangement to the 14 digit sub-watersheds.
The project as originally designed has been completed for the entire state. Also, the New Jersey state boundary as origionally defined in the USGS source coverage does not match that used by the NJDEP. Therefore the coverage was edited by the NJ Geological Survey to remove the USGS state boundary and insert the NJDEP state boundary, thus resolving most potential clipping errors.
NJGS received sub-huc14 basins coverage from USGS-WRD in NAD27 UTM coordinates and began processing into Dephuc14 in NAD83 State Plane Feet coordinates. Projection resulted in a coverage that was shifted about 735 ft SSW in comparison to earlier coverages. The reason for, and origin of this shift is unknown. Therefore, the projected coverage was manually transformed using an affine transformation to best fit the correct line positions based on a comparison to earlier version of the dephuc14 coverage.
Basis for dephuc14
1. USGS Process notes for huc14 coverage: Hydrologic unit codes were used to tag each drainage basin polygon in the entire state with a 14-digit code. Various subsets of these 14 digits are included in the data set. They are coded in the attribute HUC14, which has pieces of it redefined as HUC4, HUC6, HUC8, and HUC11. HUC 02040206010 (Oldman's Creek) was moved from HUC8 02040206 (Cohansey & Maurice) to HUC8 02040202 (Lower Delaware) HUC 02040301010 (Manasquan River) was moved from HUC8 02040301 (Mullica & Toms River) to HUC8 02030104 (Sandy Hook & Staten Island) Moved hucdiv 11 arc at point of Sandy Hook to new point on New Jersey/New York state boundary line For Atlantic Ocean coastline, offshore buffer created at 3 miles. Buffer at 5 miles is ocean. Hucdiv arcs between New Jersey and Staten Island, New York coded item hucdiv = 11. Delineations are in agrrement with huc boundaries of publication Hydrologic Watershed Unit Map-1980 State of New York Hucdiv arcs between Staten Island and Long Island, New York coded item hucdiv = 8 Delineations are in agreement with huc boundaries of publication Hydrologic Watershed Unit Map-1980 State of New York hucdiv arcs of huc11 polygon 02040301050 changed Reassigning of subpolygons of huc14 02040301080100 to 02040301050040, Reassigning of subpolygons of huc14 02040301080110 to 02040301050050, new arc digitzed for huc11 boundary at Seaside bridge reason consolidation of Kettle Creek Added offshore polygon huc14 02030104910020 Added offshore polygons huc14 02030104920020 and 02030104920030 Added offshore polygons huc14 02030104930020 and 02030104930030 Added offshore polygons huc14 02040301910020 and 02040301910030 Added offshore polygons huc14 02040301920020, 02040301920030, and 02040301920040 Added offshore polygons huc14 02040302910020 and 02040302910030 Added offshore polygons huc14 02040302920020, 02040302920030, 02040302920040, 02040302920050, and 02040302920060 Added offshore polygons huc14 02040204910020, 02040204910030, and 02040204910040 Moved huc14 02040206070010 to 02040206060100 Moved the huc8 arc from the coastline to the state line for huc14 02040206060100 Calculated coastline arcs for huc8 02040206 item hucdiv equal to 8 Moved subpoly of huc14 02040105150040 to 02040105150020 Reassigning of subpolygons of huc14 02020007040030 to 02020007040050, reason consolidation of Wawayanda Creek Reassigning of subpolygons of huc14 02020007040030 to 02020007040040, reason consolidation of Black Creek Reassigning of subpolygons of huc14 02030105160040 to 02030105160070, reason consolidation of South River watershed Reassigning of subpolygons of huc14 02030105100140 to 02030105100130, reason consolidation of Bear Brook Reassigning of subpolygons of huc14 02030105110070 to 02030105110070, reason consolidation of Beden Brook Reassigning of subpolygons of huc14 02030104070060 to 02030104070070, reason consolidation of Beden Brook Reassigning of subpolygons of huc14 02030104060060 to 02030104070110, reason consolidation of lower Shrewsbury River Reassigning of subpolygons of huc14 02040301160100 to 02040301160110, reason consolidation of Albertson Brook Reassigning of subpolygons of huc14 02040301150060 to 02040301150040, reason consolidation of Springers Brook Reassigning of subpolygons of huc14 02040301190040 to 02040301190030, reason consolidation of West Branch of Wading River Reassigning of subpolygons of huc14 02040301190070 to 02040301190050, reason consolidation of West Branch of Wading River Reassigning of subpolygons of huc14 02040302050130 to 02040302050090, reason consolidation of English Creek subwatershed Reassigning of subpolygons of huc14 02040206140010 to 02040206120050, reason consolidation of lower Still Run Reassigning of subpolygons of huc14 02040206140060 to 02040206140010, reason consolidation of subbasins of Maurice River Reassigning of subpolygons of huc14 02040202120060 to 02040202120080, reason consolidation of Big Timber Creek Reassigning of subpolygons of huc14 02040202120060 to 02040202120020, reason consolidation of North Branch of Big Timber Creek Reassigning of subpolygons of huc14 02040206040010 to 02040206040030, reason consolidation of subbasin Reassigning of subpolygons of huc14 02040202060020 to 02040202060050, reason consolidation of Black Run Reassigning of some subpolygons of huc14 02040201030010 to 02040201070030, reason consolidation of Crosswicks Creek Reassigning of some subpolygons of huc14 02040202160060 to 02040206020010, reason consolidation of Oldmans Creek Reassigning of some subpolygons of huc14 02030103100010 to create new 02030103100020, all of remaing huc14 polygons in 02030103100 were renumbered, reason consolidation of Masonicus Brook and Mahwah River Reassigning of subpolygons of huc14 02030103040020 to 02030103120060, reason consolidation of Deepavaal Brook New hucdiv line digitized for huc14 02030103120010, reason consolidation of Peckman River Reassigning of subpolygons of huc14 02040105110040 to 02040105120020, reason consolidation of Lopatcong Creek. New arc digitized for delineation. Reassigning of subpolygons of huc14 02040105110020 to 02040105110030, reason consolidation of Buckhorn Creek. 2. NJGS Processing Notes for Dephuc14 12/22/99 NJGS received sub-huc14 basins coverage from USGS-WRD in NAD27 UTM coordinates and began processing into Dephuc14 in NAD83 State Plane Feet coordinates. Projection resulted in a coverage that was shifted about 735 ft SSW in comparison to earlier coverages. The reason for, and origin of this shift is unknown. Therefore, the projected coverage was manually transformed using an affine transformation to best fit the correct line positions based on a comparison to earlier version of the dephuc14 coverage. The coverage was built as a polygon and line coverage. 12/28/99 The new coverage was edited to delete the USGS version of the NJ State boundary, then equivalent lines from the NJDEP State-boundary reference coverage (staco) were added in their place. All node errors and label errros were edited, then the coverage was dissolved from a sub-huc14 level to the huc14 level. 12/30/99 The dephuc14 coverage was cleaned, then polygon labels from an earlier version were joined to the PAT in order to preserve NJPDES attributes for unchanged polygons. Watershed Management Area, Water Region, and new HUC codes were edited to reflect the revisions. Repeated PAT items were dropped. 01/03/00 The dephuc14 AAT was edited to add USGS and NJGS field items HUCDIV and LINTYPE respectively. HUCDIV is an item used to represent the HUC4, HUC6, HUC8, HUC11, and HUC14 boundary lines, with the lower HUC values taking preceedence over higher values. LINTYPE denotes those lines taken from the NJ State boundary theme (LINTYPE 9). 01/26/00 Arc attibutes were manually updated to reflect HUC and LINTYPE values. The coverage was then rebuilt. 02/04/00 Arcs were added and deleted from the coverage based on NJDPES review to correct HUC14 basin delineation. 02/10/00 ARCS were added to coverage based on NJPDES review and USGS agreement to correct HUC14 basin delineation. All HUCDIV arcs items and HUC14 polygon items updated and checked. The set of 212 NAD83 quadrangle tics for the State were added to dephuc14 to replace the set of four tics originally included in the coverage. The dephuc14 coverage was cleaned and duplicated as dephuc14bup. 03/17/00 Created two new HUC14 polygons by adding two new lines based on NJPDES review of proposed changes with the USGS. Recleaned the coverage. 03/20/00 Updated coverage polygon labels with NJPDES labels. Added HUC4, HUC6, HUC8, WREGION, WR-NAME, WMA_NAME and WMNAME items and updated them to DWM specifications. 03/27/00 Added a new HUC11 line to split offshore HUC11 02040302910 in order to add 02040302920. Updated HUCDIV lintypes for altered area. Update HUC14 d_swid codes for 4 polygons. Dissolved dephuc14 into dephuc11, added and updated .PAT items for WMA, WMA_NAME, WREGION, and WR_NAME. 9/11/00 Calculated total drainage area of each subwatershed. This includes area that drains to the subwatershed plus that of the subwatershed. Expressed area in acres and square miles. Added areas to coverage.
The first step in creating the cross acceptance layer was to code the HUC14 sub-watershed polygons with some additional attributes. The HUC14 layer was merged with the 1995/97 LU/LC layer so that the mean impervious surface percent of each HUC14 basin could be calculated. The LU/LC layer includes an estimate of the impervious surface percentage of each polygon mapped in that layer. Using this value, a mean impervious surface percentage could be calculated for each sub-watershed mapped in the HUC14 layer. Once the mean value was calculated, all HUC14 basins with a value of less than 10%, could be identified, and coded as such. HUC14 basins were also analyzed to identify those that drained to water supply intake points, those that contained existing C1 water features and those that were identified as providing natural drainage to selected water supply reservoirs. For the first, an existing NJDEP data layer showing water supply intakes was merged with the above HUC14 layer, and all sub-watersheds draining to a subset of mapped surface water intake points were identified and coded. The intakes subset included those intakes that supplied water from natural drainage only. It is to be noted that all HUC14 sub-watersheds above the location of the selected intake points, i.e., all upstream watersheds, were identified as a water supply watershed. To identify sub-watersheds containing Category One (C1) waters, a NJDEP layer with existing C1 waters was merged with the sub-watershed layer from the above analysis. This C1 layer is described at: http://www.nj.gov/dep/cleanwater/c1.html. Sub-watersheds containing a C1 water feature were identified and coded as such. For C1 coding, note that only the sub-watershed containing the C1 feature was coded for C1 status. Those sub-watersheds containing natural drainage to selected reservoirs were also identified and coded. The natural drainage layer was created by NJDEP to supplement the C1 and water intake layers. Although a separate attribute, all watersheds coded as having natural drainage for the selected reservoirs also are, in fact, coded for the water supply intake or C1 attributes. The sub-watersheds with the natural reservoir drainage were identified in a process similar to that described above for the other watershed attributes. Sub-watersheds that had either an impervious surface less than 10%, that drained to water supply intake points, that contained C1 waters, or had natural drainage to selected reservoirs, or any combination of these factors, are considered critical sub-watersheds. A particular basin may have more than one of the above characteristics, but only needed a positive in one of the four categories to be considered for further analysis. Sub-watersheds without any of these characteristics were not included in any further analysis. Once the sub-watershed layer was coded, and all critical sub-watersheds identified, the layer underwent an additional analysis step. The critical sub-watersheds identified in the above steps were merged with the developed lands layer selected from the 1995/97 LU/LC dataset. All those portions of the critical sub-watersheds that were undeveloped could then be identified, and selected for inclusion in the final layer. Those watershed portions that were developed, or built up, were eliminated from further consideration.
Internal feature number.
ESRI
AREA
ESRI
Perimeter
ESRI
ESRI ID field
ESRI
ESRI ID field
ESRI
Sub-watershed identified that drans to water supply/intake
NJDEP
Sub-watershed does drain to water supply/intake.
NJDEP
Sub-watershed does not drain to water supply/intake.
NJDEP
Sub-watershed identified containing C1 waters
NJDEP
Sub-watershed does contain C1 waters
NJDEP
Sub-watershed does not contain C1 waters
NJDEP
Impervious Surface of less than ten percent
NJDEP
Sub-watershed is identified as having imperious surface of less than ten percent
NJDEP
Sub-watershed is not identified as having imperious surface of less than ten percent
NJDEP
Sub-watershed contains natural draining to selected reservoirs
NJDEP
Sub-watershed contains natural draining to selected reservoirs
NJDEP
Sub-watershed does not contain natural draining to selected reservoirs
NJDEP
Feature geometry.
ESRI
IDENTIFIED AS HUC14
NJDEP
YES
NJDEP
401 East State Street, First Floor, PO Box 428
Call 609-984-2243 with questions concerning only the acquisition/download of this data set. Call the metadata reference contact with questions concerning the data.
For all data contained herein, NJDEP makes no representations of any kind, including, but not limited to, the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the digital data layers furnished hereunder. NJDEP assumes no responsibility to maintain them in any manner or form. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
PO Box 427
Contact Jeff Hoffman with questions on original HUC14 data. Contact John Tyrawski (609-777-0151) with any questions regarding the cross-acceptance data.