Collaborative Research: Refinement of Techniques for Estimating Evapotranspiration from Narrow Riparian Zones--Water Balance and Atmosphere Measurements

合作研究：狭窄河岸带蒸散量估算技术的改进——水平衡和大气测量

• 批准号: 0741397
• 负责人: Harihar RAJARAM
• 金额: $ 31.34万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0741397&HistoricalAwards=false
• 关键词: Collaborative; Research; Refinement; Techniques; Estimating

Project AbstractThis project is one component of the larger Hydro-Kansas (HK) Project. It has the common goal to develop a robust, testable theory of coupled processes on ordered networks (COPON) in order to predict atmospheric, hydrologic, landscape and ecological responses at multiple space and time scales. This project addresses evapotranspiration (ET) in riparian zones; which make up only a small percentage of the total landscape, but contribute disproportionately to basin-wide ET. Riparian areas are generally narrow areas that do not meet ?fetch? requirements and so are not amenable to traditional methods of flux measurement. This project will apply the most modern technology available, from a scanning water vapor Raman lidar to a subsurface water budget approach that can be implemented for measurement of ET on streams of different orders. The proposed lidar method involves a novel two dimensional inversion method that estimates what the ET had to have been to generate lidar-measured two dimensional water vapor concentrations downwind of the riparian area. The information on riparian ET will provide a theoretical basis for testing COPON theory.

项目摘要：该项目是大型水电堪萨斯（香港）项目的一个组成部分。它的共同目标是发展一个强大的、可测试的有序网络（COPON）耦合过程理论，以便在多个空间和时间尺度上预测大气、水文、景观和生态响应。本项目研究河岸带的蒸散发（ET）；它们只占总景观的一小部分，但对整个流域的ET贡献不成比例。河岸区通常是狭窄的区域，不满足？要求等不适用于传统的通量测量方法。该项目将采用最先进的技术，从扫描水蒸气拉曼激光雷达到地下水预算方法，可以实现对不同量级流的ET测量。提出的激光雷达方法涉及一种新的二维反演方法，该方法可以估计出在河岸地区顺风处产生激光雷达测量的二维水蒸气浓度所需要的ET。河岸ET信息将为验证COPON理论提供理论依据。