Doctoral Dissertation Research: Biogeochemical Processes and Hydrologic Characteristics of Alpine Talus

博士论文研究：高山距骨生物地球化学过程及水文特征

• 批准号: 9628375
• 负责人: Mark Williams
• 金额: $ 1万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9628375&HistoricalAwards=false
• 关键词: Doctoral; Dissertation; Research; Biogeochemical; Processes

Davinroy, Thomas C U. of Colorado, Boulder The doctoral dissertation research will examine biogeochemical and hydrologic controls on solutes and flowpaths in alpine watersheds by extending field investigations to include high-elevation talus fields. The research design integrates previous approaches and incorporates innovative isotopic research with spatially distributed hydrologic models to fully evaluate the hydrologic and biogeochemical processes which occur within alpine talus. The hydrologic characteristics of talus, including flowpaths, residence time and transmissivity will be quantified through physical measurement of natural isoptopic content and experimental addition of salt tracers. Intensive sampling of subtalus flow by vacuum evacuation techniques provides evidence of both spatial and temporal transformations of talus groundwater chemistry. Microbial processes and resultant contribution to surface water will be explored by sampling of subtalus fines to determine if they act as surrogate soils in transforming snowmelt chemistry.

Davinroy，托马斯C U.来自科罗拉多，博尔德 博士论文的研究将通过扩展实地调查，包括高海拔的岩屑田，研究高山流域溶质和流动路径的地球化学和水文控制。 研究设计集成了以前的方法，并结合了创新的同位素研究与空间分布的水文模型，充分评估水文和地球化学过程发生在高山堆积。 岩屑堆的水文特性，包括流动路径、停留时间和渗透率，将通过自然同位素含量的物理测量和盐示踪剂的实验添加来量化。 密集采样的堆积岩下流真空抽真空技术提供了空间和时间转换的堆积岩地下水化学的证据。 微生物的过程和由此产生的贡献地表水将探讨采样的坡下细粉，以确定它们是否作为替代土壤转化融雪化学。