Durighetto Nicola, Botter Gianluca
Department of Civil Environmental and Architectural Engineering University of Padua Padova Italy.
Geophys Res Lett. 2022 Jul 28;49(14):e2022GL099500. doi: 10.1029/2022GL099500. Epub 2022 Jul 20.
The ever-changing hydroclimatic conditions of the landscape induce ceaseless variations in the wet channel length () and the streamflow () of a catchment. Here we use a perceptual model to analyze the links among (and the drivers of) four descriptors commonly used to characterize discharge and active length dynamics in streams, namely the () relationship and the cumulative distributions of local persistency, flowrate and active length. The model demonstrates that the shape of the () law is defined by the cumulative distribution of the specific subsurface discharge capacity along the network, a finding which provides a clue for the parametrization of () relations in dynamic streams. Furthermore, we show that () laws can be constructed combining the streamflow distribution with disjoint active length data. Our framework links previously unconnected formulations for characterizing stream network dynamics, and offers a novel perspective to describe the scaling between wet length and discharge in rivers.
景观不断变化的水文气候条件导致集水区的湿河道长度（）和径流（）持续变化。在此，我们使用一种感知模型来分析常用于表征河流流量和活动长度动态的四个描述符之间（以及其驱动因素）的联系，即（）关系以及局部持续性、流量和活动长度的累积分布。该模型表明，（）定律的形状由沿网络的特定地下排水能力的累积分布定义，这一发现为动态河流中（）关系的参数化提供了线索。此外，我们表明，可以将径流分布与不连续的活动长度数据相结合来构建（）定律。我们的框架将先前未关联的用于表征河网动态的公式联系起来，并为描述河流湿长度与流量之间的标度提供了一个新视角。
