The following publications can be downloaded from this web site. They require Adobe Reader version 7 or higher or a compatible reader to display properly. The GWGIS reports for Pitkin County, Delta County, Castle Valley, and City of Moab contain graphics and pictures in medium resolution to save on storage and download time.  Contact Heath Hydrology, Inc. if you need a high resolution electronic copy.

Vulnerability of Carlsbad Caverns, NM

Van der Heijde, P.K.M., K.E. Kolm, H.E. Dawson, and M. Brooke. 1997. Determining Water Infiltration Routes from Structures Located above Carlsbad Cavern, Carlsbad Caverns National Park, Carlsbad, New Mexico. Report prepared for National Park Service, Fort Collins, Colorado.

Download this report (10.5 Mb)

GIS-Based Groundwater Evaluation of Upper/Middle Roaring Fork Area, CO

Kolm, K.E., and P.K.M. van der Heijde. 2005. Development of GIS-Based Ground Water Resources Evaluation of the Upper and Middle Roaring Fork  Valley Area, Pitkin County, Colorado. Report prepared for Pitkin County Board of County Commissioners.

Download this report (9.6 Mb)

GIS-Based Groundwater Evaluation of Capitol/Snowmass Creek Area, CO

Kolm, K.E., P.K.M. van der Heijde, and M. Dechesne. 2007. GIS-Based Ground Water Resources Evaluation of the Capitol and Snowmass Creek (CSC) Study Areas, Pitkin County, Colorado. Report prepared for Pitkin County Board of County Commissioners.

Download this report (5.0 Mb)

GIS-Based Groundwater Evaluation of Crystal River Area, CO

Kolm, K.E., P.K.M. van der Heijde, and M. Dechesne. 2008. GIS-Based Ground Water Resources Evaluation of the Crystal River and West Sopris Creek (CRWS) Study Area, Pitkin County, Colorado. Report prepared for Pitkin County Board of County Commissioners.

Download this report (5.8 Mb)

GIS-Based Groundwater Evaluation of the Central Roaring Fork Tributaries Area, CO -- HESA and Conceptual Models

Kolm, K.E., and P.K.M. van der Heijde. 2011. Hydrologic and Environmental System Analysis and Formulation of Conceptual Models for the Central Roaring Fork Tributaries (CRFT), Pitkin County, Colorado. Report prepared for Pitkin County Board of County Commissioners.

Download this report (3.0 Mb)

GIS-Based Groundwater Evaluation, Pitkin County, CO -- County-wide GIS Maps

Van der Heijde, P.K.M., and K.E. Kolm. 2011. Development of County-wide Hydrogeological and Hydrological GIS Maps for Pitkin County, Colorado. Report prepared for Pitkin County Board of County Commissioners.

Download this report (3.0 Mb)

GIS-Based Groundwater Evaluation, Pitkin County, CO -- Availability, Sustainability and Vulnerability of Groundwater Resources

Van der Heijde, P.K.M., and K.E. Kolm. 2011. Development of GIS Maps Showing Aspects of Availability, Sustainability and Vulnerability of Groundwater Resources, Pitkin County, Colorado. Report prepared for Pitkin County Board of County Commissioners.

Download this report (0.9 Mb)

GIS-Based Groundwater Evaluation for Pitkin County, CO [fact sheet]

Download this fact sheet (2.5 Mb)

GIS-Based Hydrological and Environmental Systems Analysis for Evaluation of Groundwater Resources in Delta County, CO - Phase 1: Oak Mesa Area

Kolm, K.E., and P.K.M. van der Heijde. 2012. Groundwater Systems in Delta County, Colorado: Oak Mesa Area. Report prepared for Delta County Board of County Commissioners. (Includes January 2013 Addendum).

Download this report (4.1 Mb)

GIS-Based Hydrological and Environmental Systems Analysis for Evaluation of Groundwater Resources in Delta County, CO - Phase 2: North Fork Valley and Terraces Area

Kolm, K.E., and P.K.M. van der Heijde. 2013. Groundwater Systems in Delta County, Colorado: North Fork Valley and Terraces Area. Report prepared for Delta County Board of County Commissioners.

Download this report (3.7 Mb)

GIS-Based Hydrological and Environmental Systems Analysis for Evaluation of Groundwater Resources in Delta County, CO - Phase 3: Surface Creek Valley and Adjacent Mesas

Kolm, K.E., and P.K.M. van der Heijde. 2014. Groundwater Systems in Delta County, Colorado: Surface Creek Valley Area. Report prepared for Delta County Board of County Commissioners.

Download this report (6.4 Mb)

GIS-Based Hydrological and Environmental Systems Analysis for Evaluation of Groundwater Resources in Delta County, CO - Phase 4: Uncompahgre Valley and the Town of Delta Area

Kolm, K.E., and P.K.M. van der Heijde. 2015. Groundwater Systems in Delta County, Colorado: Uncompahgre Valley and Town of Delta (UVTD). Report prepared for Delta County Board of County Commissioners.

Download this report (6.6 Mb)

Hydrological Assessment of the Surface Water and Groundwater Resources of Castle Valley, Utah, Phase 1-3, Hydrological and Environmental System Analysis (HESA), Supporting GIS Development and Preliminary Water Budget (PWB) for the Town of Castle Valley (TCV) Study Area

Kolm, K.E., and P.K.M. van der Heijde. 2016. Hydrologic Assessment of the Surface Water and Groundwater Resources of Castle Valley, Utah: Part 1: Hydrologic and Environmental System Analysis (HESA) and Preliminary Water Budget. Report prepared for Town of Castle Valley, Utah.

Download this report (5.0 Mb)

Hydrologic and Hydrogeologic Assessment of the Surface Water and Groundwater Resources of the Grandstaff, Mill and Pack Creek Watersheds, Grand and San Juan Counties, Utah, in Support of Source Protection for the Wells and Springs Providing Water to the City of Moab, Utah. Phase 1: Hydrological and Environmental System Analysis (HESA)

Kolm, K.E., and P.K.M. van der Heijde. 2018. Hydrologic and Hydrogeologic Assessment of the Surface Water and Groundwater Resources Affecting the Moab City Springs and Wells, Moab, Utah: Phase 1: Hydrologic and Environmental System Analysis (HESA) and Conceptual Models. Report prepared for City of Moab, Utah.

Download this report (6.7 Mb)

An early report written by Paul van der Heijde concerns the drought of 1976 in The Netherlands. At that time, Paul van der Heijde was working at the Groundwater Survey TNO institute, now part of  the Geological Survey of The Netherlands TNO-GDN. This report has regained new actuality as The Netherlands (and large parts of Western and Northern Europe) are again experiencing severe drought conditions in 2018.

Heijde, P.K.M. van der. 1978. De Droogte van 1976 (The Drought of 1976; in Dutch). Committee for Hydrologic Research TNO, Series Reports and Bulletins # 3, The Hague, The Netherlands.

Download this report (13 Mb)

Heijde, P.K.M. van der. 1978. The 1976 Drought in The Netherlands: A Summary; in English).

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