Mean residual water level error - Gippsland 1990

## **Abstract** \n\nThis dataset was supplied to the Bioregional Assessment Programme by a third party and is presented here as originally supplied. Metadata was not provided and has been compiled by the Bioregional Assessment Programme based on known details at the time of acquisition. \n\n\n\nThe spatial distributions of residual water level errors are presented for 1980, 1990, 2000 and 2010. The mean residual water level is defined such that negative numbers refer to points where predicted groundwater head values are higher than observed and positive values indicate that predicted groundwater head values are lower than observed.\n\n\n\nThe dataset was generated in the Gippsland Groundwater Model (Beverly et al 2015). The 1990 residual error reflects the difference between the simulated and the measured water level surfaces at groundwater monitoring bores across all aquifers.\n\n## **Purpose** \n\nThe purpose of the residual error data layer is to provide an indication of the modelled groundwater level surfaces performance relative measured groundwater level data as of 1990.\n\n\n\n"Results .. suggest that the model over predicts the heads in the outcropped regions and under predicts the heads in the lower parts of the landscape. The greatest errors are shown to be in the outcropping regions ....suggesting that the model attribution associated with model layer 23 requires further analysis. This is consistent with observations reported .....that considered the hydraulic conductivities attributed to zones 23-29 were on the lower bounds of previously reported values."\n\nExtract from the Gippsland groundwater model technical report (Beverly et al, 2015)\n\n## **Dataset History** \n\nMeasured groundwater level sourced from the Victorian groundwater database and reported as metres above sea level. The 1990 simulated water level sourced from the Gippsland Groundwater Model (Beverly et al 2015). Calculation made by Measured minus Simulated. \n\nGippsland groundwater model technical report (Beverly et al, 2015).\n\n## **Dataset Citation** \n\nVictorian Department of Economic Development, Jobs, Transport and Resources (2015) Mean residual water level error - Gippsland 1990. Bioregional Assessment Source Dataset. Viewed 05 October 2018, http://data.bioregionalassessments.gov.au/dataset/7f531c93-8b18-4bd0-a7ef-d2e37b89a280.

**摘要**

本数据集由第三方提供给生物区域评估计划（Bioregional Assessment Programme），本文档按原始提交形式呈现。数据集未附带元数据，由生物区域评估计划依据采集时已知的相关细节编制完成。

本数据集展示了1980年、1990年、2000年及2010年的水位残差误差空间分布。平均残余水位的定义为：负值代表预测地下水位水头（groundwater head）高于实测值的测点，正值则代表预测地下水位水头低于实测值的测点。

本数据集基于吉普斯兰地下水模型（Gippsland Groundwater Model，Beverly等人，2015年）生成。1990年的残余水位误差反映了所有含水层（aquifer）内地下水监测孔（groundwater monitoring bores）处模拟水位面与实测水位面之间的差值。

## **数据集用途**

本残差误差数据图层的用途在于，反映1990年时模拟地下水位面相对于实测地下水位数据的拟合表现。

研究结果表明，该模型对出露区的水位水头存在高估，而对地形低洼区域的水位水头存在低估。其中误差最大的区域位于出露区……这说明与模型第23层（model layer 23）相关的模型赋值方案需进一步分析。这与此前报道的观测结果一致：研究认为23-29号分区的导水率（hydraulic conductivity）处于既往报道数值的下限区间内。

——节选自《吉普斯兰地下水模型技术报告》（Beverly等人，2015年）

## **数据集编制沿革**

实测地下水位数据源自维多利亚州地下水数据库，以海拔米为单位记录。1990年模拟水位数据源自吉普斯兰地下水模型（Gippsland Groundwater Model，Beverly等人，2015年）。残差误差通过实测水位减去模拟水位计算得到。

《吉普斯兰地下水模型技术报告》（Beverly等人，2015年）

## **数据集引用格式**

维多利亚州经济发展、就业、交通与资源部（2015年）：1990年吉普斯兰地区平均残余水位误差数据集。生物区域评估计划源数据集。2018年10月5日查阅，来源网址：http://data.bioregionalassessments.gov.au/dataset/7f531c93-8b18-4bd0-a7ef-d2e37b89a280。