Evaluation of well heads by using different approaches: Well package, multi-node well package, and analytical solution

Jesús R. Gastélum, Zhuping Sheng, Chenggang Wang, Shiliang Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An integrated spatially distributed groundwater-econometric model is being developed for the Southern Ogallala aquifer located almost entirely in the northwestern part of Texas (Texas High Plains) with a minor portion in New Mexico. The groundwater flow model provides well heads (which are used to estimate pumping lift) and maximum well yield data needed for the econometric model, while the econometric model provides inputs for water use (pumping rate) and return flows into the groundwater flow model. One of the preliminary challenges of this modeling effort is to select an appropriate method to estimate well heads. Three alternatives are evaluated: (a) the traditional approach which assumes that well head value is equal to the cell head values where the well is located (under this approach wells are introduced into the MODFLOW model using the Well package); (b) wells are introduced into the model with the Multi-Node Well (MNW) package, which has imbedded the steady state Thiem equation accounting for aquifer head losses and, consequently, provides with a more accurate estimation of well head values; and c) the third is analytical solution, by integrating the wells and the equation in ArcGIS environment and estimating the well head values by using the steady state Thiem Equation. By comparing results from three methods, one can gain insights into precision of each method in the estimation of well head values, and could serve as a reference for other water resources assessment with similar modeling requirements.

Original languageEnglish
Title of host publicationWorld Environmental and Water Resources Congress 2011
Subtitle of host publicationBearing Knowledge for Sustainability - Proceedings of the 2011 World Environmental and Water Resources Congress
Pages898-903
Number of pages6
DOIs
StatePublished - 2011
EventWorld Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability - Palm Springs, CA, United States
Duration: May 22 2011May 26 2011

Publication series

NameWorld Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability - Proceedings of the 2011 World Environmental and Water Resources Congress

Conference

ConferenceWorld Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability
CountryUnited States
CityPalm Springs, CA
Period05/22/1105/26/11

Keywords

  • Aquifers
  • Groundwater
  • Wells

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    Gastélum, J. R., Sheng, Z., Wang, C., & Zhao, S. (2011). Evaluation of well heads by using different approaches: Well package, multi-node well package, and analytical solution. In World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability - Proceedings of the 2011 World Environmental and Water Resources Congress (pp. 898-903). (World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability - Proceedings of the 2011 World Environmental and Water Resources Congress). https://doi.org/10.1061/41173(414)92