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首页> 外文会议>AWRA's 2000 Summer Specialty Conference on Riparian Ecology and Management in Multi-Land USE Watersheds Aug 28-31, 2000 Portland, Oregon >THERMAL DEFINITION OF SUBSURFACE FLOW SOURCES WITHIN A CASCADIAN RIPARIAN LANDSCAPE
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THERMAL DEFINITION OF SUBSURFACE FLOW SOURCES WITHIN A CASCADIAN RIPARIAN LANDSCAPE

机译：CASCADIAN RIPARIAN景观中地下流热源的热定义

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摘要

Constant Channel, a floodplain tributary of Constant Creek, is used to study complex subsurface and surface water interactions for a riparian floodplain landscape in the North Cascade Mountains, Washington. A mixed coniferous and deciduous riparian forest covers the floodplain and terraces. Subsurface and surface water temperature data are used to examine the hypothesis: subsurface flows within riparian floodplains originate in three distinct source areas―hillslope, terrace, and river. Subsurface water thermal regimes provide an independent discriminator of source areas, even though heat transport within the systems is mainly by convection. Relationships between soil and subsurface water temperatures suggest: (1) soil temperatures can be used to identify recharge and discharge areas, (2) remnant fluvial geomorphic features, including buried substrate deposits and channels, are paths of focused recharge, and (3) dynamic local flow regimes form on lower terraces and floodplains. The hypothesized differences in source areas and changes in water thermal regimes provide insights into subsurface flow dynamics and practical methods for delineating source areas of other riparian landscapes.
机译：恒定河道（Constant Creek）的洪泛平原支流，用于研究华盛顿州北部喀斯喀特山脉的河岸洪泛区景观的复杂地下和地表水相互作用。泛滥的平原和梯田覆盖着针叶和落叶混合的河岸森林。地下和地表水温度数据用于检验假设：河岸泛滥平原内的地下水流起源于三个不同的水源区：山坡，梯田和河流。即使系统内的热量传输主要是通过对流进行，地下水热状况也可以独立地区分源区。土壤与地下水温之间的关系表明：（1）土壤温度可用于识别补给和排出区域；（2）残留的河流地貌特征，包括埋藏的基底沉积物和河道，是集中补给的路径；（3）动态的较低的阶地和洪泛区形成局部流动状态。假设的源区差异和水热状况的变化提供了对地下流动动力学的见解，以及用于描绘其他河岸景观源区的实用方法。

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