Modelling of a Post-Mining Catchment for Future Simulations
Landform evolution modelling (LEM) provides an avenue for simulating how a landscape may evolve over extended time periods of thousands of years. CAESAR-Lisflood LEM which includes a hydrologic model (TOPMODEL) and a hydraulic model (Lisflood) can be used to assess the proposed final landform morpho...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
|
| Series: | Mining |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-6489/3/3/25 |
| _version_ | 1797578702893088768 |
|---|---|
| author | Devika Nair K. G. Evans Sean Bellairs |
| author_facet | Devika Nair K. G. Evans Sean Bellairs |
| author_sort | Devika Nair |
| collection | DOAJ |
| description | Landform evolution modelling (LEM) provides an avenue for simulating how a landscape may evolve over extended time periods of thousands of years. CAESAR-Lisflood LEM which includes a hydrologic model (TOPMODEL) and a hydraulic model (Lisflood) can be used to assess the proposed final landform morphology of a mine site by simulating how the mine landform and the landscape would evolve over a 1000-year period. The accuracy of future simulations depends on the calibration and validation of the model to past and present events. Calibration and validation of the model involve finding a combination of parameters of the model which when applied and simulated gives model outputs similar to those observed for the real site scenario for corresponding input data. Calibrating the sediment output of the CAESAR-Lisflood model at the catchment level and using it for studying the equilibrium conditions of the landform is an area that has yet to be explored. Therefore, the aim of this study was to calibrate the CAESAR-Lisflood model and then validate it. To achieve this, the model was run for a rainfall event with a set of parameters, plus discharge and sediment data for the input point of the catchment, to analyse how similar the model output would behave when compared with the discharge and sediment data for the output point of the catchment. The model parameters were then adjusted until the model closely approximated the real site values of the catchment. The model was then validated by running it for a different set of events and checking that the model gave similar results to the real site values. The outcomes demonstrated that while the model can be calibrated to a greater extent for hydrology (discharge output) throughout the year, sediment output calibration may be slightly improved via the ability to change parameters to take into account the seasonal vegetation growth during the start and end of the wet season. This study is important for designing and testing post-mining rehabilitated landscape systems that assess hydrology and sediment movement in seasonal biomes. |
| first_indexed | 2024-03-10T22:26:33Z |
| format | Article |
| id | doaj.art-d97ec48b2f2f45a39d80039fb90f1c13 |
| institution | Directory Open Access Journal |
| issn | 2673-6489 |
| language | English |
| last_indexed | 2024-03-10T22:26:33Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Mining |
| spelling | doaj.art-d97ec48b2f2f45a39d80039fb90f1c132023-11-19T12:06:14ZengMDPI AGMining2673-64892023-07-013340942710.3390/mining3030025Modelling of a Post-Mining Catchment for Future SimulationsDevika Nair0K. G. Evans1Sean Bellairs2Research Institute for Environment & Livelihoods, Charles Darwin University, Ellengowan Drive, Casuarina, NT 0810, AustraliaCollege of Engineering, IT & Environment, Charles Darwin University, Ellengowan Drive, Casuarina, NT 0810, AustraliaResearch Institute for Environment & Livelihoods, Charles Darwin University, Ellengowan Drive, Casuarina, NT 0810, AustraliaLandform evolution modelling (LEM) provides an avenue for simulating how a landscape may evolve over extended time periods of thousands of years. CAESAR-Lisflood LEM which includes a hydrologic model (TOPMODEL) and a hydraulic model (Lisflood) can be used to assess the proposed final landform morphology of a mine site by simulating how the mine landform and the landscape would evolve over a 1000-year period. The accuracy of future simulations depends on the calibration and validation of the model to past and present events. Calibration and validation of the model involve finding a combination of parameters of the model which when applied and simulated gives model outputs similar to those observed for the real site scenario for corresponding input data. Calibrating the sediment output of the CAESAR-Lisflood model at the catchment level and using it for studying the equilibrium conditions of the landform is an area that has yet to be explored. Therefore, the aim of this study was to calibrate the CAESAR-Lisflood model and then validate it. To achieve this, the model was run for a rainfall event with a set of parameters, plus discharge and sediment data for the input point of the catchment, to analyse how similar the model output would behave when compared with the discharge and sediment data for the output point of the catchment. The model parameters were then adjusted until the model closely approximated the real site values of the catchment. The model was then validated by running it for a different set of events and checking that the model gave similar results to the real site values. The outcomes demonstrated that while the model can be calibrated to a greater extent for hydrology (discharge output) throughout the year, sediment output calibration may be slightly improved via the ability to change parameters to take into account the seasonal vegetation growth during the start and end of the wet season. This study is important for designing and testing post-mining rehabilitated landscape systems that assess hydrology and sediment movement in seasonal biomes.https://www.mdpi.com/2673-6489/3/3/25landform evolution modellingcatchment hydrologypost-mining landscapesediment transportmine rehabilitation |
| spellingShingle | Devika Nair K. G. Evans Sean Bellairs Modelling of a Post-Mining Catchment for Future Simulations Mining landform evolution modelling catchment hydrology post-mining landscape sediment transport mine rehabilitation |
| title | Modelling of a Post-Mining Catchment for Future Simulations |
| title_full | Modelling of a Post-Mining Catchment for Future Simulations |
| title_fullStr | Modelling of a Post-Mining Catchment for Future Simulations |
| title_full_unstemmed | Modelling of a Post-Mining Catchment for Future Simulations |
| title_short | Modelling of a Post-Mining Catchment for Future Simulations |
| title_sort | modelling of a post mining catchment for future simulations |
| topic | landform evolution modelling catchment hydrology post-mining landscape sediment transport mine rehabilitation |
| url | https://www.mdpi.com/2673-6489/3/3/25 |
| work_keys_str_mv | AT devikanair modellingofapostminingcatchmentforfuturesimulations AT kgevans modellingofapostminingcatchmentforfuturesimulations AT seanbellairs modellingofapostminingcatchmentforfuturesimulations |