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

英国土地利用和气候变化等条件的变化影响了集水行为，其中一个关键挑战与集水区内沉积物的去除、重新分布和沉积有关。集水区内沉积物的增加正在造成水质处理费用增加等问题。这一点在德温特河研究区内可以清楚地看到。降低与水质处理相关的成本的一种方法是包括从土地所有者到水务公司的整个供应链。可以使用地理信息系统等软件绘制集水区内细粒沉积物的来源图。本研究旨在建立一个地理信息系统模型和框架，以评估流域内与细粒沉积物有关的敏感河段和区域，包括流域内的源区、沉积物路径和沉积物沉积。该模型将整合高分辨率卫星图像，为土地使用和植被的季节性变化以及气候变化预测提供信息。一旦确定了敏感区域，将开展实地工作，以评估产出的有效性。实地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内需要进行管理或干预以减少细粒沉积物影响的地区。该模型将直接受益于约克郡水，因为创建一个地理信息系统模型将减少与突出这些地区相关的实地工作的成本。通过纳入整个供应链和土地使用者，将减少与土壤侵蚀和清除宝贵表土有关的成本。进一步减少流入河流的细颗粒泥沙将减少洪水风险。水是经济的一个组成部分，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.