Water Levels and Regional Groundwater Flow Sample Clauses

Water Levels and Regional Groundwater Flow. Water levels and water-level maps describe general groundwater flow directions, hydrologic boundaries, and provide information for the calibration of the model. At least four water-level maps shall be generated for each of the hydrostratigraphic units included in the model:  For the pre-development historical conditions prior to significant well pumping,  For the beginning of the transient calibration period,  During the transient calibration period (at a time-period chosen in cooperation with the TWDB), and  For the end of the transient calibration period (information on the transient calibration period is included in Section 3.3). The pre-development condition maps shall be based on historical water-level information, but may include more modern information to help guide water-level interpretation. Long- term historical hydrographs shall also be developed for the study area, as the data permit. These hydrographs will help define water-level fluctuations throughout the model area, and will also serve as calibration targets for the transient model. Project managers shall document and describe the following, if appropriate:  Hydraulic-head differences between hydrostratigraphic units,  Nature of the vertical connection between hydrostratigraphic units,  Areas of water-level declines, and  General water-level behavior in the aquifer. Regional groundwater flow paths shall be identified as well as any features that affect flow paths such as surface-water/groundwater interaction, significant well pumping, faulting, and cross-formational flow. Any information on cross-formational flow shall also be investigated, documented, and discussed.
Sample 1
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Water Levels and Regional Groundwater Flow. See Appendix A Section 3.1.5 and include the following maps/figures:  Maps of the potentiometric surface for each hydrostratigraphic unit as well as model layer, in case these are different, for the pre-development calibration, the beginning of the transient calibration, during the transient calibration at a time period agreed- upon with TWDB, and at the end of the transient calibration including the control points, and  Several historical hydrographs demonstrating water-level fluctuations (including seasonal, if available) in the aquifer with a map indicating location of the xxxxx, and  Historical hydrograph selections should represent unconfined (and also confined portions if applicable) of the aquifer(s) from each county in the study if data is available.
Sample 1

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