GroMoPo Metadata for Mokolo River MIKE-SHE model

Authors:

GroMoPo Daniel Kretschmer

Owners:

gromopo_admin

Type:

Resource

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The size of this resource is 1.9 KB

Created:

Feb 08, 2023 at 3:22 p.m.

Last updated:

Feb 08, 2023 at 3:22 p.m.

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Abstract

A fully integrated, physically-based MIKE SHE/MIKE11 model was developed for the Mokolo River basin flow system to simulate key hydraulic and hydrologic indicator inputs to the Downstream Response to Imposed Flow Transformation for Arid Rivers (DRIFT-ARID) decision support system (DSS). The DRIFT-ARID tool is used in this study to define environmental water requirements (EWR) for non-perennial river flow systems in South Africa to facilitate ecosystem-based management of water resources as required by the National Water Act (Act No. 36 of 1998). Fifty years of distributed daily climate data (1950 to 2000) were used to calibrate the model against decades of daily discharge data at various gauges, measurements of Mokolo Dam stage levels, and one-time groundwater level measurements at hundreds of wells throughout the basin. Though the calibrated model captures much of the seasonal and post-event stream discharge response characteristics, lack of sub-daily climate and stream discharge data limits the ability to calibrate the model to event-level system response (i.e. peak flows). In addition, lack of basic subsurface hydrogeologic characterisation and transient groundwater level data limits the ability to calibrate the groundwater flow model, and therefore baseflow response, to a high level. Despite these limitations, the calibrated model was used to simulate changes in hydrologic and hydraulic indicators at five study sites within the basin for five 50-year land-use change scenarios, including a present-day (with dam), natural conditions (no development/irrigation), and conversion of present-day irrigation to game farm, mine/city expansion, and a combination of the last two. Challenges and recommendations for simulating the range of non-perennial systems are presented.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

South Africa

North Latitude

-22.9801°

East Longitude

28.5377°

South Latitude

-24.5740°

West Longitude

27.1996°

Streets Terrain Satelite

Spatial Extent

Content

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Additional Metadata

Name	Value
DOI	10.4314/wsa.v42i3.03
Depth
Scale	1 001 - 10 000 kmÂ²
Layers	3
Purpose	Decision support
GroMoPo_ID	307
IsVerified	True
Model Code	MIKE-SHE
Model Link	https://doi.org/10.4314/wsa.v42i3.03
Model Time	1950-2000
Model Year	2016
Model Authors	Prucha, B; Graham, D; Watson, M; Avenant, M; Esterhuyse, S; Joubert, A; Kemp, M; King, J; le Roux, P; Redelinghuys, N; Rossouw, L; Rowntree, K; Seaman, M; Sokolic, F; van Rensburg, L; van der Waal, B; van Tol, J; Vos, T
Model Country	South Africa
Data Available	Report/paper only
Developer Email	prucha@integratedhydro.com
Dominant Geology	Model focuses on multiple geologic materials
Developer Country	USA; Denmark; South Africa
Publication Title	MIKE-SHE integrated groundwater and surface water model used to simulate scenario hydrology for input to DRIFT-ARID: the Mokolo River case study
Original Developer	No
Additional Information
Integration or Coupling	Surface water
Evaluation or Calibration	River discharge
Geologic Data Availability	No

How to Cite

GroMoPo, D. Kretschmer (2023). GroMoPo Metadata for Mokolo River MIKE-SHE model, HydroShare, http://www.hydroshare.org/resource/9c51d3df39fa45698c9d8a650c6aa054

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

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