Soil Erosion Network: Monitoring Metadata
Mgeri Basin, South Africa, 1990-, Sub-Tropical Savanna, Pine Plantations, Sugar Cane and Farm Land, Water Erosion

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1 Contact person
1.1 Name Dr. S.A. Lorentz
1.2 Address Dept. of Agricultural Engineering, University of Nepal, Box XO1, Scottsville, 3209, South Africa.
1.3 Tel +27 331 260 5701
1.4 Fax +27 331 260 5818
1.5 Email
1.6 Other researchers involved:
2 Survey Details
2.1 Dates of erosion monitoring survey: 1990 - present
2.1 Water/wind erosion? Water
2.3 Area monitored: 1. Sugar cane fields on sensitive soils 5km2 1+2 ha main catchments. 2. Forestry/Grassland erosion plot studies. Kwazula/Natal. 3. Regional Erosion estimation: Mgeri Basin 400 km2 + intensive sub-catchment studies : 170 km2.
2.4 Character of area: 1. Sugar cane - subcatchment monitoring. 2. S/tropical savannah and cultivated pine forests. 3. S/tropical savannah, farm land, sugar cane plantations and cultivated forests.
2.5 Frequency of monitoring: 1. Approximately 3 per year. 2. Continuously, weekly plot data. 3. One-off study - continuing.
2.6 What fraction of fields in the monitored area were included in the survey? 1. 10%. 2. 80%. 3. 100%.
2.7 How were estimates of erosion made? 1. RUSLE + main-catchment sediment yield (1995). 2. RUSLE + plot yield. 3. RUSLE
2.8 Were air photographs used? 1. Ground photographs. 2. No. 3. Yes + ground photography.
2.9 For each erosion site, information recorded: Photographic data of cover. Up to 1995 and continuing. Soils texture and physical and hydraulic properties. Small catchment sediment yield. Met. data. Full station autographic. Starting 1995. 2. Plot data, runoff, yield. Soil moisture, physical and hydraulic properties. Met. data. Full station. Autographic. 3. Air photo interpretation of cover. Soil survey information. Met. data. Daily. Subcatachment : sediment yield events : Autographic raw measurement.


2.10 Data obtained from elsewhere:
2.11 Data calculated from above information: 1. RUSLE parameters; sediment yield mass kinetic E of rain. 2. RUSLE parameters; erosion mass, K-E of rainfall. 3. RUSLE parameters. Subcatachment sediment yield, K-E of rainfall. Runoff.
2.12 Meterological station density and type: 1. 1 full met. station of 3 mini catchments 1-2 ha. 5 km apart. 2. 1 full met station on site. 3. Daily rainfall and met stations 1/50 km2.
2.13 Length of record of meterological data: 1. Start 1995. 2. Start 1988 - present. 3. 10-50 years rainfall.
3. Associated Work
3.1 Associated experimental or plot-based work: 1. Lab. analysis of soils, physical and hydraulic small catchments monitoring 1-2 ha. 2. RUSLE plots in grassland. Cultivating forestry with different prep. 3. Subcatchment sediment yield monitoring
3.2 Associated modelling work: 1. ACRU sediment yield and RUSLE. 2. RUSLE. 3. ACRU sediment yield + RUSLE.
4. Documentation
4.1 Published reports of the monitoring survey and/or results:
Design documentation only.

Reports to the South African Water Research Commission.

Kienzle and Lorentz. 1995. Simulating the Hydrology and Water Quality of the Mgeri catchment. Report to the South African Water Research Commission.

4.2 Other relevant publications:
Kienzle and Lorentz. 1993. Production of a Soil Erodibility Map for the Henley Dam Catchment, Natal. Using a GIS approach. In: Lorentz et al. 6th South African National Hydrology Symposium XII Proceedings.

Howe and Lorentz. 1995. Sediment Yield Modelling in the Henley catchment. South African Agricultural Engineering Journal. (In press).

5. Availability
5.1 Erosion/land use data: Available with costs of extraction.
5.2 Meterological data: Available with costs of extraction.
6. Other Information
6.1 Is the monitoring survey ongoing? Yes.
6.2 Funding agency for the survey: 1. South African Department of Agriculture. 2. South African Water Research Commission. 3. South African Water Research Commission.
6.3 Any other details:

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