Hi, I'm an error. x

LNWB Ch05 Land Cover


Authors: Peter Gill · Joanne Greenberg · Christina Bandaragoda
Owners: Christina Bandaragoda · Jimmy Phuong
Resource type:Collection Resource
Created:Aug 02, 2016 at 12:20 a.m.
Last updated: Oct 29, 2018 at 5:41 p.m. by HydroShare (Admin)

Abstract

Overview:
Land cover mapping represents the coverage of vegetation, bare, wet and built surfaces (developed and natural surfaces) at a given point in time. The existing land cover map was developed by Whatcom County Planning and Development Services (PDS) during spring of 2012 for the Lower Nooksack Water Budget. The dataset represents ground conditions between 2006 and 2010. The project team created the existing condition land cover dataset by combining local and regional datasets to get the most accurate and current data for the U.S. and Canadian portions of WRIA 1. The development of the existing land cover map includes 14 land cover categories; each has a unique impact on the water balance. The agricultural land cover class was further classified into crop types.

Land cover and crop types influence evapotranspiration and infiltration, playing an important role in determining the watershed’s water balance. Land cover data provides information used to parameterize the water movement through the vegetation canopy and water demand of plant evapotranspiration in the estimation of the water budget by the hydrology model.

Land cover changes over time, as exemplified by comparing the existing and historic land cover data in WRIA 1, displayed in Figure 1 and Figure 2. Historic land cover mapping developed by Utah State University (Winkelaar, 2004) as part of the WRIA 1 Watershed Management Project was used to represent land cover/land use for the undepleted flow simulations. This work was done using a suite of studies and ancillary datasets, including turn of the century GLO maps and NRCS soils data. Methods and sources more thoroughly described in Mapping Methodology and Data Sources for Historic Conditions Landuse/ Landcover Within Water Resource Inventory Area 1 (WRIA1) Washington, U.S.A. The historic land cover map includes 10 land cover classes.

Purpose:
Within the Topnet-WM hydrologic model used to estimate the Lower Nooksack Water Budget, the local land cover type is used to parameterize the water movement through the vegetation canopy and water demand for plant evapotranspiration, as described in detail in Chapter 2: Water Budget Model. Water input to the canopy comes from rainfall, snowmelt, and irrigation. The process of some water retention by the canopy is known as interception. Potential evapotranspiration is first satisfied from the canopy interception storage. Water that passes through the canopy to the soil becomes input to the vadose zone soil storage. The vadose zone is the unsaturated soil region above the water table. Potential evapotranspiration not satisfied from the interception storage becomes potential evapotranspiration from the vadose zone soil storage. The model calculates crop evapotranspiration using the Penman-Monteith method. Irrigation requirements are calculated using potential crop evapotranspiration and irrigation efficiency. Land cover mapping also identifies impervious surfaces where water directly runs off, as well as lakes and wetlands where water is stored and evaporates.

This resource is a subset of the Lower Nooksack Water Budget (LNWB) Collection Resource.

Subject Keywords

Ground conditions,land cover model parameter values,calculating basin parameter values,land cover codes,Lower Nooksack subbasin,WRIA1,land cover layers,shape files,Whatcom county

How to cite

Gill, P., J. Greenberg, C. Bandaragoda (2016). LNWB Ch05 Land Cover, HydroShare, http://www.hydroshare.org/resource/479ae9daeec34b48885f7645ea0966b4

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
CC-BY

Sharing status:

  • Public Resource  Public
  • Sharable Resource  Shareable

Coverage

Spatial:

 Coordinate System/Geographic Projection:  WGS84 EPSG:4326
 Coordinate Units:  [u'Decimal degrees']
North Latitude
48.9998°
East Longitude
-122.0532°
South Latitude
48.6474°
West Longitude
-122.7974°

Collection Contents

Add Title Type Owners Sharing Status My Permission Remove
LNWB Ch05 Land Cover - data processing GenericResource Jimmy Phuong · Christina Bandaragoda Public & Shareable Open Access
LNWB Ch05 Land Cover - subbasins, charts, and tables GenericResource Jimmy Phuong · Christina Bandaragoda Public & Shareable Open Access
LNWB Ch05 Land Cover - shape files GeographicFeatureResource Jimmy Phuong · Christina Bandaragoda Public & Shareable Open Access
LNWB Ch05 Land Cover - layers GenericResource Jimmy Phuong · Christina Bandaragoda Public & Shareable Open Access
LNWB Ch05 Land Cover - parameter values by land cover class GenericResource Jimmy Phuong · Christina Bandaragoda Public & Shareable Open Access

Authors

The people or organizations that created the intellectual content of the resource.

Name Organization Address Phone Author Identifiers
Peter Gill Whatcom County Public Works
Joanne Greenberg HydroLogic Services Co.
Christina Bandaragoda University of Washington Washington, US

Contributors

People or organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.

Name Organization Address Phone Author Identifiers
Mary Dumas Dumas & Associates
Mariza Costa-Cabral Hydrology Futures
Bracken Capen Washington State University
This resource belongs to the following collections:
Title Owners Sharing Status My Permission
Lower Nooksack Water Budget (LNWB) Christina Bandaragoda · Jimmy Phuong  Public &  Shareable Open Access
Lower Nooksack Water Budget (LNWB) Bert Rubash  Private &  Shareable None

Credits

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
WRIA 1 Joint Board Lower Nooksack Water Budget Whatcom County Contract 201111021

Ratings

Be the first one to  +1 this.  (You need to be logged in to rate this.)

Comments

There are currently no comments

New Comment

required