地表水和地下水灌区农田水热循环过程及其尺度扩展研究

项目名称： 地表水和地下水灌区农田水热循环过程及其尺度扩展研究

项目编号： No.40871021

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 沈彦俊

作者单位： 中国科学院遗传与发育生物学研究所农业资源研究中心

项目金额： 45万元

中文摘要： 本项目在过去3年通过灌溉农田水热通量和土壤水地下水的监测与稳定同位素分析，重点研究了华北平原不同灌溉水源农田水热循环过程，量化了蒸散耗水的时空结构和主要耗水作物－冬小麦的土壤水分利用机制；通过建立考虑灌溉活动的地表水热过程模型，模拟了过去30年来海河流域水热通量的时空变化，明确了灌溉活动和土地利用变化对区域水热循环的影响。 结合本项目的实施，完善了华北平原农田水循环监测实验系统，新建立农林系统水热传输通量塔一座；发表研究论文13篇，其中SCI论文3篇，授权专利2项（含一项发明专利），培养研究生5名。

中文关键词： SPAC水热循环过程；遥感；尺度转换；陆面过程模型；灌溉活动

英文摘要： Through integrated field experiments and monitoring on the water, energy, and CO2 fluxes over the groundwater and Yellow River water irrigated lands, we analysed the difference of the fluxes between these two-water-source irrigated fields, and quantified the partitioning of the evapotranspiration. This research explored the water use mechanism of winter wheat, which is the most important water consuming crop in NCP, by combining micrometeorologic and isotopic method. We also constructed an energy balance based land surface model to simulate the change in energy and water balance over Hai River Basin in the past 30 years, discussed the impacts of irrigation development and lang use change on regional energy and water fluxes. Through the carrying-out of this project, we established and enhanced the overvation systems on water/energy fluxes and water transformation in G-SPAC system in NCP. These facilities will continue to contribute to clarify the water cycle mechanisms in agro-ecosystems and help understanding the susteainability of water resources and grain production in NCP. In the past 3 yeats, 13 papers were worked out and published in peer reviewed journals, among them there are 3 papers are in ISI indexed journals, another 2 patents are received with regard to some techniques in the field experiments. 5 graudate students carried out their researches under this project's support, 3 of them obtained their degrees, and the other 2 will be expected graduate in coming year.

英文关键词： Water and heat transfer in SPAC; Remote sensing; Scaling-up; Land surface model; Irrigation activities