Implications of river restoration for geomorphic diversity and flood risk

利用苏格兰和英格兰西北部6条河流长达十年的重复地形调查数据集，这个博士项目将提供一个机会来探索英国高地流域河流恢复计划的中期影响。该项目采用跨流域的比较方法，表现出不同的水文和形态制度，旨在了解河流恢复项目是否可以作为一种有效的洪水管理形式，同时恢复更“自然”的水文制度，以支持生态系统恢复。通过重复地形测量，成功的候选人将使用二维水力模型和地貌变化检测（GCD）软件，从河流形态和水力学的变化方面评估河流恢复方案。例如，通过将二维洪水模型结果与GCD输出相结合，候选人可以分析河流恢复对河床剪切应力分布的影响，并将输出与GCD结果进行比较，突出地貌变化的区域。将根据国家河流流量档案馆的水文数据、历史洪水事件的卫星图像和实地调查对数值模型进行校准。

Drawing on a decade-long dataset of repeat topographic surveys from 6 rivers across Scotland and North-Western England, this PhD project will offer an opportunity to explore the mid-term impact of river restoration schemes in upland catchments in the UK. Using a comparative approach across catchments which exhibit different hydrological and morphological regimes, the project aims to understand if river restoration projects can be implemented as an effective form of flood management while restoring a more 'natural' hydrological regime to support ecosystem recovery. Using the repeat topographic surveys, the successful candidate will use 2D hydraulic modelling and geomorphic change detection (GCD) software to appraise the river restoration schemes in terms of changes to river morphology and hydraulics. For example, by combining 2D flood model results with GCD output, the candidate can analyse the effect of the river restoration on the distribution of bed shear stress in time and compare outputs to GCD results which highlight regions of geomorphic change. The numerical model will be calibrated against hydrological data from the National River Flow Archive, satellite imagery of historical flood events, and field surveys.