The Maryland coastal plain aquifer information system: A GIS-based tool for assessing groundwater resources

被引：3

作者：

Andreasen D.C. ^{[1
]}

Nardi M.R. ^{[2
]}

Staley A.W. ^{[1
]}

Achmad G. ^{[3
]}

Grace J.W. ^{[4
]}

机构：

[1] Maryland Geological Survey, B3, Tawes State Office Building, 580 Taylor Avenue, Annapolis, 21401, MD

[2] U.S. Geological Survey, 1289 McD Drive, Dover, 19901, Delaware

[3] Maryland Geological Survey, 2300 St. Paul Street, Baltimore, 21218, MD

[4] Maryland Department of the Environment, 1800 Washington Blvd., Baltimore, 21230, MD

来源：

Special Paper of the Geological Society of America | 2016年 / 520卷

关键词：

Landforms - Water management - Water supply - Climate change - Hydrogeology - Recharging (underground waters) - Surface waters - Sustainable development - Information systems - Geographic information systems - Water quality - Information management - Information use - Potable water - Water levels - Groundwater resources - Quality control;

D O I：

10.1130/2016.2520(15)

中图分类号：

学科分类号：

摘要：

Groundwater is the source of drinking water for ∼1.4 million people in the Coastal Plain Province of Maryland (USA). In addition, groundwater is essential for commercial, industrial, and agricultural uses. Approximately 0.757 × 109 L d-1 (200 million gallons/d) were withdrawn in 2010. As a result of decades of withdrawals from the coastal plain confi ned aquifers, groundwater levels have declined by as much as 70 m (230 ft) from estimated prepumping levels. Other issues posing challenges to long-term groundwater sustainability include degraded water quality from both man-made and natural sources, reduced stream base fl ow, land subsidence, and changing recharge patterns (drought) caused by climate change. In Maryland, groundwater supply is managed primarily by the Maryland Department of the Environment, which seeks to balance reasonable use of the resource with long-term sustainability. The chief goal of groundwater management in Maryland is to ensure safe and adequate supplies for all current and future users through the implementation of appropriate usage, planning, and conservation policies. To assist in that effort, the geographic information system (GIS)-based Maryland Coastal Plain Aquifer Information System was developed as a tool to help water managers access and visualize groundwater data for use in the evaluation of groundwater allocation and use permits. The system, contained within an ESRI ArcMap desktop environment, includes both interpreted and basic data for 16 aquifers and 14 confi ning units. Data map layers include aquifer and confi ning unit layer surfaces, aquifer extents, borehole information, hydraulic properties, timeseries groundwater-level data, well records, and geophysical and lithologic logs. The aquifer and confi ning unit layer surfaces were generated specifi cally for the GIS system. The system also contains select groundwater-quality data and map layers that quantify groundwater and surface-water withdrawals. The aquifer information system can serve as a pre- and postprocessing environment for groundwater-fl ow models for use in water-supply planning, development, and management. The system also can be expanded to include features that evaluate constraints to groundwater development, such as insuffi cient available drawdown, degraded groundwater quality, insuffi cient aquifer yields, and well-fi eld interference. Ultimately, the aquifer information system is intended to function as an interactive Web-based utility that provides a broad array of information related to groundwater resources in Maryland's coastal plain to a wide-ranging audience, including well drillers, consultants, academia, and the general public. © 2016 The Geological Society of America. All rights reserved.

引用

页码：159 / 170

页数：11