Physical and biological dynamic coastal processes and their role in coastal recovery (BLUE-coast)

物理和生物动态海岸过程及其在海岸恢复中的作用（蓝色海岸）

基本信息

批准号：
NE/N015665/1
负责人：
Eli Lazarus
金额：
$ 6.74万
依托单位：
CARDIFF UNIVERSITY
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FN015665%2F1
关键词：
Physical biological dynamic coastal processes

项目摘要

The BLUE-coast consortium addresses NERC highlight topic B, Coastal morphology: coastal sediment budgets and their role in coastal recovery. This project will adopt a holistic and multidisciplinary approach, combining the expertise of biologists, coastal engineers, geologists, geomorphologists and oceanographers with complementary experimental (field and laboratory) and numerical skills, to understand what processes control the coastal system dynamics and answer the relevant scientific questions.BLUE-coast will explicitly address uncertainties in the prediction of medium-term (years) and long -term (decadal and longer) regional sediment budgets and better understand morphological change and how the coast recovers after sequences of events, such as storms by: (i) improving representation of both transportable and source material within the coastal zone within models; (ii) establishing how transportable material is mediated by the ecological system using exemplar habitats representative of the UK coastal zone; (iii) assessing sensitivities of this mixed-sediment physical and biological system to possible changes in external forcing, including the combined impact of multiple variables and sequences of events, with the goal of understanding the internal dynamics of the system (e.g. nonlinearities, critical thresholds, tipping points, precursors and antecedent conditions) in parallel with assessments of behavioural uncertainties, and (iv) reduce uncertainties in medium to long -term prediction of regional sediment budgets and morphological change. Project Overview: the scope of the Highlight Topic sets a requirement for quantitative knowledge on both physical and biological dynamic coastal processes in order to improve hydrodynamic model predictions of regional sediment budgets and morphological change. To deliver an integrated, holistic and cost effective response, our main activities will combine (i) a detailed study of representative shelf sea landscapes that spans the full variety of organism-sediment conditions typically observed in temperate coasts, with (ii) in situ validation studies of key processes, and (iii) manipulative laboratory and field experiments aimed at unambiguously identifying causal relationships and establishing generality, and (iv) integration of new understanding of controls and effects on coastal morphodynamics at regional scales and under environmental forcing. By undertaking a substantial element of in situ observation and process studies, we will directly quantify the effect of antecedent conditions on coastal erosion and recovery, the effect of biota on mediating sediment fluxes and pathways and the effect of event sequencing on coastal erosion and recovery, across a range of geographically significant sediment habitats. These data will act as calibration and validation datasets for existing and innovative numerical models that will be able to simulate the coastal morphological consequences of key biological and physical drivers, alone and in combination. We will gain mechanistic understanding and achieve generality by performing carefully controlled experiments, generating different flow regimes using flumes, tracking changes during natural events using state-of-the-art field measurement technology and, in the laboratory, using intact sediments and sediment communities exposed to anticipated future conditions (warming, ocean acidification, nutrient loading). As it is not feasible to quantify all the relevant morphodynamic processes at high spatial resolution across the entire UK coast, our approach is to address the principal objectives through 4 interdisciplinary workpackages that follow a logical progression of scientific themes.

蓝色海岸联盟介绍了NERC重点主题B，沿海形态：沿海沉积物预算及其在沿海恢复中的作用。该项目将采用一种整体和多学科的方法，结合生物学家，沿海工程师，地质学家，地貌学家和海洋学的专业知识，并具有互补的实验性（现场和实验室）和数值技能，以了解哪些过程控制沿海系统的动态并回答相关科学问题。更长的时间）区域泥沙预算，更好地了解形态变化以及在事件序列之后的海岸如何恢复，例如：（i）改善模型内沿海地区内可运输和原始物质的表示；（ii）建立使用代表英国沿海地区的示例性栖息地的生态系统介导的可运输材料；（iii）评估这种混合物质物理和生物系统的敏感性，以使外部强迫的可能变化，包括多个变量和事件序列的综合影响，目的是了解系统的内部动力学（例如，非线性，关键阈值，关键阈值，临界阈值，倾斜点，前体和前态条件）在较长的范围内进行了延长 - 不及格的态度 - （介质），并且（介质）的惯例是不可或缺的（均不可见的）（（区域沉积物预算和形态变化。项目概述：重点主题的范围设定了对物理和生物动态沿海过程的定量知识的要求，以改善区域沉积物预算和形态学变化的流体动力学模型预测。 To deliver an integrated, holistic and cost effective response, our main activities will combine (i) a detailed study of representative shelf sea landscapes that spans the full variety of organism-sediment conditions typically observed in temperate coasts, with (ii) in situ validation studies of key processes, and (iii) manipulative laboratory and field experiments aimed at unambiguously identifying causal relationships and establishing generality, and (iv) integration of对控制和对沿海形态动力学的影响的新理解，在区域尺度和环境强迫下。通过实现原位观察和过程研究的重大元素，我们将直接量化先决条件对沿海侵蚀和恢复的影响，生物群对介导的沉积物通量和途径的影响以及事件测序对沿海侵蚀和沿海沿海恢复的影响，跨地理沉积物遍布地理位置上重要的沉积物。这些数据将充当现有和创新的数值模型的校准和验证数据集，这些模型将能够单独和组合模拟关键生物学和物理驱动因素的沿海形态后果。我们将通过进行仔细控制的实验，使用液泡产生不同的流动方式，使用最先进的现场测量技术来跟踪自然事件的变化，并在实验室中使用完整的沉积物和泥沙群落来追踪自然事件，从而在自然事件中产生不同的流动状态，并使用完整的沉积物和沉积物群落来追踪自然事件，并使用完整的沉积物群落来追踪自然事件，从而获得了一般性的理解。由于在整个英国海岸的高空间分辨率下量化所有相关的形态动力学过程是不可行的，因此我们的方法是通过4个跨学科的工作包解决主要目标，遵循科学主题的逻辑发展。