River Murray Floodplain Groundwater Model 2015: Salinity dynamics of the River Murray floodplain in South Australia

Groundwater models produced from GOYDER INSTITUTE FOR WATER RESEARCH Project No. E1.11.A series of numerical groundwater models have been designed to represent generic floodplain conditions that exist along the River Murray in SA, from the border to Lock 1. The aim is to improve understanding and modelling capability of flow and salinity dynamics, to assist with management and engineering decisions.Multiple base case scenarios are considered, varying by floodplain topography, the presence or local absence of a lock, and whether the river conditions are gaining, throughflow or losing. Model variants were developed to investigate how results depended on the methods used to simulate key processes, including river level changes, floodplain inundation, groundwater evapotranspiration, and solute transport.The MODFLOW and MT3DMS simulations were developed using Groundwater Vistas version 6. Some data inputs were pre-processed using scripts in Python 2.7.6.0. Post-processing was done with both Groundwater Vistas and Python.Model parameters are informed by an amalgamation of data from the study area, but are not specific to any one location. Where there is a wide range of possible parameters, values from the Pike Floodplain have been adopted. Where no local field data exists, values were used from the literature and/or from DEWNR’s Salinity Register regional models.As the Goyder Floodplain Model is a synthetic model, in that it does not model a specific location, no detailed calibration was possible. However, the models were constrained based on the current knowledge of floodplains along the SA River Murray, such as in-stream geophysics, estimated actual evapotranspiration, and Run of River estimates of groundwater salt flux to the river.Location:- South Australia, Australia- The models simulate a generic domain representing conditions in the River Murray floodplain between the SA Border and Lock 1. Conditions are similar upstream of the SA Border as far as Nangiloc-Colignan.

由戈伊德水资源研究所（GOYDER INSTITUTE FOR WATER RESEARCH）项目编号E1.11所生产的地下水模型。该系列数值地下水模型旨在模拟南澳大利亚州（SA）墨累河（River Murray）沿岸普遍存在的河漫滩条件，从边界至第一闸门。其目标是提升对水流和盐度动态的理解与建模能力，以辅助管理与工程决策。考虑了多种基础案例场景，这些场景根据河漫滩地形、是否存在闸门以及河流条件是上升、通过还是下降而有所变化。开发了多种模型变体，以研究结果如何依赖于模拟关键过程所采用的方法，包括水位变化、河漫滩淹没、地下水蒸散和溶质传输。MODFLOW和MT3DMS模拟使用地下水视景（Groundwater Vistas）6.0版本开发。一些数据输入使用Python 2.7.6.0中的脚本进行预处理。后处理则同时使用地下水视景和Python进行。模型参数基于研究区域数据的综合，但并非针对特定地点。在参数范围较广的情况下，采纳了皮克河漫滩（Pike Floodplain）的值。在缺乏本地现场数据的情况下，使用了文献中的值或DEWNR的盐度登记处区域模型中的值。由于戈伊德河漫滩模型是一种合成模型，即它不针对特定地点建模，因此无法进行详细校准。然而，模型基于对SA州墨累河沿岸河漫滩当前知识的约束，例如河道地球物理学、估计的实际蒸散量以及对河流地下水盐通量的河流估计。位置：澳大利亚南澳大利亚州。该模型模拟了一个通用领域，代表了SA边境至第一闸门之间墨累河河漫滩的条件。SA边境上游的条件与Nangiloc-Colignan地区相似。