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Evaluation of estuary shoreline shift in response to climate change: A study from the central west coast of India
Land Degradation & Development ( IF 3.6 ) Pub Date : 2018-07-16 , DOI: 10.1002/ldr.3074
Rajasree B. R. 1 , M. C. Deo 1
Affiliation  

The prediction of coastal sediment transport and rate of change of shorelines into the future are traditionally done by analysis of historical satellite imageries and field observations or by empirical/numerical modeling. The modeling is traditionally done on the basis of historical data. Instead, here, we suggest the use of future conditions impacted by the climate change for this purpose and a procedure based on regional climate models. Further, considering the difficulty at some places to acquire a large amount of data of various parameters to run a numerical model, we propose the use of simple neural network as an alternative. The location studied belongs to the shoreline adjoining the estuary of River Gangavali, along the central west coast of India. Waves were simulated using a numerical wave model for past and future time periods of 36 years each, and a numerical coastal evolution model was run with this input. It was found that in future, the wave activity at this site would intensify along with certain shift in the direction of wave attack. This will push the net and gross sediment transports up by 131.7% and 114.3%, respectively, and also enhance the shoreline change rate. It was noticed that the future shifts in the wave direction could be as influential as those in the wave height and can cause more accretion of the shoreline. The study emphasizes the importance of considering the projected climate over the past one in planning a regional coastal ecosystem.

中文翻译:

河口海岸线变化对气候变化响应的评估:来自印度中西部海岸的一项研究

传统上,通过分析历史卫星图像和实地观测或通过经验/数值模拟,可以预测沿海沉积物的运输和未来海岸线的变化率。传统上,建模是基于历史数据进行的。相反,在这里,我们建议为此目的使用受气候变化影响的未来条件,以及基于区域气候模型的程序。此外,考虑到在某些地方难以获取大量各种参数的数据以运行数值模型的问题,我们建议使用简单神经网络作为替代方法。研究的位置属于沿印度中部西海岸与Gangavali河河口相邻的海岸线。使用数字波浪模型对海浪进行了模拟,模拟了过去和将来每个时期的36年,并使用此输入运行了数字海岸演化模型。结果发现,未来该地点的波浪活动将随着波浪攻击方向的一定变化而加剧。这将使净泥沙输送量和总泥沙输送量分别增加131.7%和114.3%,并提高海岸线变化率。人们注意到,海浪方向的未来变化可能与海浪高度的变化一样有影响力,并可能导致海岸线增加积聚。这项研究强调了在规划区域沿海生态系统时考虑过去气候的重要性。该位置的波浪活动将随着波浪攻击方向的一定偏移而加剧。这将使净泥沙输送量和总泥沙输送量分别增加131.7%和114.3%,并提高海岸线变化率。人们注意到,海浪方向的未来变化可能与海浪高度的变化一样有影响力,并可能导致海岸线增加积聚。这项研究强调了在规划区域沿海生态系统时考虑过去气候的重要性。该位置的波浪活动将随着波浪攻击方向的一定偏移而加剧。这将使净泥沙输送量和总泥沙输送量分别增加131.7%和114.3%,并提高海岸线变化率。人们注意到,海浪方向的未来变化可能与海浪高度的变化一样有影响力,并可能导致海岸线增加积聚。这项研究强调了在规划区域沿海生态系统时考虑过去气候的重要性。人们注意到,海浪方向的未来变化可能与海浪高度的变化一样有影响力,并可能导致海岸线增加积聚。这项研究强调了在规划区域沿海生态系统时考虑过去气候的重要性。人们注意到,海浪方向的未来变化可能与海浪高度的变化一样有影响力,并可能导致海岸线增加积聚。这项研究强调了在规划区域沿海生态系统时考虑过去气候的重要性。
更新日期:2018-07-16
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