ABSTRACT:

Aquifer storage can help to reduce drought and salinisation stress. Succesfull implementation is, among others, dependent on choosing a suitable location. A novel model based tool was developed to assess the ASR suitabilty on the island of Texel, Netherlands, where fresh water demand is high, but conditions are challenging. Pre-processing of input data is automatised as well as grid optimization and filter placement. The results show more favourable areas as well as the effect of ASR scale. Furthermore, the number of required wells to reach a target recovery is presented. The computation time was brought down within feasible range, and resolution appeared sufficient. The tool requires only a coordinate and an area size, making it easy to use. However, several improvements are suggested to make its use more general applicable.

ABSTRACT:

Models that mimic an original model might have a different model structure that affects model output. This study assesses model structure differences and their impact on output by comparing 7 model implementations that carry the name HBV. We explained and quantified output differences with individual model structure components at both the numerical and mathematical level. It was found that none of the numerical and mathematical formulations of the mimicking models were (originally) the same as the benchmark, HBV-light. This led to small but distinct output differences for numerical implementations, and major output differences due to mathematical differences, although differences decreased after calibration. We argue that the lack of systematic model naming has led to a diverging concept of the HBV-model, diminishing the concept of model mimicry. Development of a systematic model naming framework, open accessible model code and more elaborate model descriptions are suggested to enhance model mimicry.