| 项目编号: | 1446870
|
| 项目名称: | Threshold hydrologic change across the intermittent-persistent snow transition |
| 作者: | Stephanie Kampf
|
| 承担单位: | Colorado State University
|
| 批准年: | 2014
|
| 开始日期: | 2015-03-01
|
| 结束日期: | 2019-02-28
|
| 资助金额: | USD268080
|
| 资助来源: | US-NSF
|
| 项目类别: | Continuing grant
|
| 国家: | US
|
| 语种: | 英语
|
| 特色学科分类: | Geosciences - Earth Sciences
|
| 英文关键词: | soil moisture
; snow transition
; change
; transition
; snow loss
; snow persistence
; persistent winter snowpack impact water resource
; project
; snow water equivalent datum
; persistent snowpack
; intermittent snow
; snowpack accumulation
; modis snow cover imagery
|
| 英文摘要: | This project will develop a geographic synthesis of snow, streamflow, and soil moisture data across the western U.S. and the analyses will provide key information that can be used to identify areas most vulnerable to large hydrologic changes due to smaller snowpack accumulation. Datasets produced will be publicly available and this information can be incorporated into land and aquatic resource management, particularly in locations that lack hydrologic data. The project will train a PhD student and undergraduate research assistants, develop an interactive digital display for education outreach and student recruitment, and develop a hydrology class activity using soil moisture simulations.
Loss of persistent winter snowpack impacts water resources in mountain and high latitude regions throughout the world, and the need to understand water resource vulnerability to snow loss is pressing. The central hypothesis guiding this research is that loss of a persistent snowpack triggers changes in both stream flow and soil moisture, but the magnitude of this change is greater in more arid climates. This project will document the geographic distribution of intermittent-persistent snow transitions in the western U.S. and examine how streamflow and soil moisture are affected by these transitions. Snow transitions will be mapped using both MODIS snow cover imagery and snow water equivalent data from SNOTEL sites. Indices of snow transitions will then be compared to streamflow and soil moisture data at both annual-decadal time scales and event-seasonal time scales. HYDRUS-1D simulations of soil moisture changes in response to varying scenarios of snow persistence will be developed for SNOTEL sites in two different climate regions to examine how process interactions between snow loss and hydrologic response vary with climate. The study synthesizes a top-down approach examining runoff and soil moisture changes across geographic gradients of snow persistence with a bottom-up process modeling approach examining how soil moisture responds to a transition from persistent to intermittent snow. The multi-scale approach will help in understanding how regional long-term patterns link with local conditions in individual seasons. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95084
|
| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
Stephanie Kampf. Threshold hydrologic change across the intermittent-persistent snow transition. 2014-01-01.
|
|
|