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The Hydrogeology of Cold Regions in ...

Evans, Sarah Grace.

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The Hydrogeology of Cold Regions in a Warming World.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Hydrogeology of Cold Regions in a Warming World./
作者:	Evans, Sarah Grace.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	106 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
Contained By:	Dissertation Abstracts International78-10B(E).
標題:	Hydrologic sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10269140
ISBN:	9781369785104

The Hydrogeology of Cold Regions in a Warming World.
Evans, Sarah Grace.

The Hydrogeology of Cold Regions in a Warming World. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 106 p.

Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2017.

Frozen ground is found extensively at high latitudes and intermittently at high elevation areas at lower latitudes, underlying half of the exposed land surface in the Northern Hemisphere. In these cold regions, frozen ground acts as an aquitard, impeding downward groundwater flow while simultaneously enhancing groundwater-surface water interactions. Frozen ground falls into two major categories: seasonally frozen ground, where the minimum annual ground surface temperature is less than 0°C and the shallow subsurface freezes and thaws annually, and perennially frozen ground or permafrost, where the subsurface temperature is at or below 0°C for two or more consecutive years. As global air temperatures increase, frozen ground degrades. Frozen ground degradation alters groundwater recharge, groundwater contribution to stream flow, and consequently, vital freshwater supplies to lowland regions. This dissertation evaluates the effects of warming on groundwater discharge in representative cold regions. Coupled heat transfer and groundwater flow processes are modeled for a suite of catchments, including sites on the Qinghai-Tibet Plateau, China and in the Colorado Rocky Mountains, USA.

ISBN: 9781369785104Subjects--Topical Terms:

3168407
Hydrologic sciences.

The Hydrogeology of Cold Regions in a Warming World.
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520 $a Frozen ground is found extensively at high latitudes and intermittently at high elevation areas at lower latitudes, underlying half of the exposed land surface in the Northern Hemisphere. In these cold regions, frozen ground acts as an aquitard, impeding downward groundwater flow while simultaneously enhancing groundwater-surface water interactions. Frozen ground falls into two major categories: seasonally frozen ground, where the minimum annual ground surface temperature is less than 0°C and the shallow subsurface freezes and thaws annually, and perennially frozen ground or permafrost, where the subsurface temperature is at or below 0°C for two or more consecutive years. As global air temperatures increase, frozen ground degrades. Frozen ground degradation alters groundwater recharge, groundwater contribution to stream flow, and consequently, vital freshwater supplies to lowland regions. This dissertation evaluates the effects of warming on groundwater discharge in representative cold regions. Coupled heat transfer and groundwater flow processes are modeled for a suite of catchments, including sites on the Qinghai-Tibet Plateau, China and in the Colorado Rocky Mountains, USA.
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