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Modelling the cumulative impacts of future coal mining and coal seam gas extraction on river flows: applications of methodology
Journal of Hydrology ( IF 6.4 ) Pub Date : 2021-05-08 , DOI: 10.1016/j.jhydrol.2021.126440
Neil R. Viney , David A. Post , Yongqiang Zhang , Fazlul Karim , Santosh K. Aryal , Mat Gilfedder , Jorge Peña Arancibia , Bill Wang , Ang Yang , Ramneek Singh , Xiaogang Shi , Russell S. Crosbie , Luk J.M. Peeters , Natasha F. Herron , Jai Vaze , Steve Marvanek , Debbie Crawford , Adam Ramage , Adrian Dehelean , Dennis Gonzalez , Lingtao Li , Tim Evans

This manuscript presents examples of the modelling of the impacts of coal mining and coal seam gas extraction on streamflow in five study catchments in Australia. The manuscript includes details on data preparation and model set-up and calibration. The modelling methodology enables the prediction of cumulative impacts from multiple future coal resource developments and distributes these predictions at multiple locations in the landscape. It is framed in terms of a structured uncertainty analysis to provide information on the likelihoods and potential ranges of various impacts. Also included is a qualitative uncertainty analysis which subjectively assesses the likely impact on model results of various assumptions made during the modelling procedure. Model results suggest that, in the Australian context, maximum percentage reductions in annual streamflow are approximately commensurate with the proportion of coal mine coverage. In coal seam gas fields, reductions in annual streamflow are proportional to well density. The manuscript goes on to demonstrate how these modelling results can be used to identify a zone of potential hydrological change within a catchment. This zone delineates those parts of the landscape where water-dependent landscape classes and assets may be vulnerable to change associated with changes in the streamflow regime. A corollary of this is that any parts of the landscape outside the zone of potential hydrological change are unlikely to be affected by coal resource development.



中文翻译:

模拟未来煤炭开采和煤层气开采对河流流量的累积影响:方法学的应用

该手稿介绍了澳大利亚五个研究流域的煤炭开采和煤层瓦斯抽采对水流影响的建模实例。该手稿包括有关数据准备,模型设置和校准的详细信息。该建模方法能够预测来自未来多个煤炭资源开发的累积影响,并将这些预测分布在景观的多个位置。它以结构化的不确定性分析为框架,以提供有关各种影响的可能性和潜在范围的信息。还包括定性不确定性分析,可以主观评估建模过程中各种假设对模型结果的可能影响。模型结果表明,在澳大利亚的情况下,年度流量最大减少百分比大约与煤矿覆盖率相对应。在煤层气田中,年流量减少与井密度成正比。该手稿继续说明如何将这些建模结果用于识别集水区中潜在的水文变化区域。该区域划定了景观的那些部分,在这些部分中,与水有关的景观类别和资产可能容易受到与水流状况变化相关的变化的影响。推论是,潜在的水文变化区域之外的景观的任何部分都不太可能受到煤炭资源开发的影响。年流量的减少与井密度成正比。该手稿继续说明如何将这些建模结果用于识别集水区中潜在的水文变化区域。该区域划定了景观的那些部分,在这些部分中,与水有关的景观类别和资产可能容易受到与水流状况变化相关的变化的影响。推论是,潜在的水文变化区域之外的景观的任何部分都不太可能受到煤炭资源开发的影响。年流量的减少与井密度成正比。该手稿继续说明如何将这些建模结果用于识别集水区中潜在的水文变化区域。该区域划定了景观的那些部分,在这些部分中,与水有关的景观类别和资产可能容易受到与水流状况变化相关的变化的影响。推论是,潜在的水文变化区域之外的景观的任何部分都不太可能受到煤炭资源开发的影响。该区域划定了景观的那些部分,在这些部分中,与水有关的景观类别和资产可能容易受到与水流状况变化相关的变化的影响。推论是,潜在的水文变化区域之外的景观的任何部分都不太可能受到煤炭资源开发的影响。该区域划定了景观的那些部分,在这些部分中,与水有关的景观类别和资产可能容易受到与水流状况变化相关的变化的影响。推论是,潜在的水文变化区域之外的景观的任何部分都不太可能受到煤炭资源开发的影响。

更新日期:2021-05-08
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