An Integrated Approach to Assessing Catchment Resilience: Combining GIS and Field Data in Relation To Climate Change Projections in the River Derwen

在英国，土地利用和气候变化等不断变化的条件影响了集水区的行为，其中一个关键挑战与集水区内沉积物的移除、重新分配和沉积有关。集水区泥沙淤积的增加造成了诸如水质处理费用增加等问题。这在德文特河的研究区域内可以清楚地看到。减少与水质处理相关的成本的一种方法是将整个供应链包括在内，从土地所有者到水务公司。可以使用诸如地理信息系统（GIS）之类的软件来绘制集水区内细粒沉积物的来源。本研究旨在建立一个GIS模型和框架，以评估集水区内与细粒沉积物有关的敏感河段和区域，包括源区、沉积物路径和集水区内的沉积物沉积。该模型将整合高分辨率卫星图像，为土地利用和植被的季节变化以及气候变化预测提供信息。一旦确定了敏感河段，将进行实地工作以评估产出的有效性。野外工作数据收集将包括沉积物粒度分析和沉积物指纹识别，以确定来源地区。该模型将确定集水区中需要管理或干预的区域，以减少细颗粒沉积物的影响。该模型将直接使约克郡水务公司受益，因为创建一个GIS模型将减少与突出这些区域相关的现场工作成本。通过将整个供应链和土地使用者包括在内，将减少与土壤侵蚀和宝贵表层土壤流失有关的成本。进一步减少细粒泥沙流入河流将降低洪水风险。水是经济不可分割的一部分，通过降低与水处理相关的成本，供水将变得更具弹性。这将有助于保持经济的弹性，这是工业战略的一个关键挑战。

Changing conditions such as land-use and climate change in the UK has affected catchment behaviour, one of the key challenges is related to the removal, redistribution and deposition of sediment within a catchment. The increased deposition of sediment within catchments is causing problems such as increased water quality treatment costs. This is clearly seen within the River Derwent study area. One way to reduce costs associated with water quality treatment is to include the whole supply chain, from land owners to water companies. The source of fine grained sediment within a catchment can be mapped using software such as geographic information systems (GIS). This research aims to produce a GIS model and framework to assessing sensitive reaches and areas within a catchment in relation to fine grained sediment including source areas, sediment pathways and sediment deposition within the catchment. The model will integrate high resolution satellite imagery to inform seasonal changes in land-use and vegetation and climate change projections. Once sensitive reaches have been identified, field work will be undertaken to assess the validity of the output. Field work data collection will include sediment grain size analysis and sediment fingerprinting to identify source areas. The model will identify areas within the catchment where management or intervention is required to reduce the impacts of fine grained sediment. The model will directly benefit Yorkshire Water as creating a GIS model will reduce the costs of fieldwork associated with highlighting these areas. By including the whole supply chain and land-users, costs will be reduced in relation to soil erosion and the removal of valuable top soil. Further reducing the input of fine grained sediment into rivers will reduce flood risk. Water is an integral part of the economy, and by reducing costs associated with water treatment, the water supply will become more resilient. This will help keep a resilient economy, a key challenge with regards to the Industrial Strategy.