Specifications of the Monitoring Network Installed in the Mpongwe Karst Area and the Kafubu and Kafulafuta Catchments
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Groundwater Management in Zambia with Focus on the Upper Kafue Catchment TECHNICAL NOTE NO. 2 Specifications of the Monitoring Network Installed in the Mpongwe Karst Area and the Kafubu and Kafulafuta Catchments Marcus Fahle, Max Karen, Dr. Tobias El-Fahem, Torsten Krekeler & Mumba Kolala Lusaka/Ndola, July 2017 REPUBLIC OF ZAMBIA Ministry of Water Development, Sanitation and Environmental Protection Groundwater Management in Zambia with Focus on the Upper Kafue Catchment Specifications of the Monitoring Network Installed in the Mpongwe Karst Area and the Kafubu and Kafulafuta Catchments Authors: Marcus Fahle (BGR/GReSP), Max Karen (GReSP), Dr. Tobias El-Fahem (BGR/GReSP), Torsten Krekeler (BGR), Mumba Kolala (WARMA) Commissioned by: Federal Ministry for Economic Cooperation and Development (Bundesministerium für wirtschaftliche Zusammenarbeit und Entwicklung, BMZ) Project: Groundwater Management in Zambia with Focus on the Upper Kafue Catchment BMZ-No.: PN 2014.2073.6 BGR-No.: 05-2386 BGR-Archive No.: Date: July 2017 -2- SUMMARY Authors: Marcus Fahle (BGR/GReSP), Max Karen (GReSP), Dr. Tobias El-Fahem (BGR/GReSP), Torsten Krekeler (BGR), Mumba Kolala (WARMA) Title: Specifications of the Monitoring Network Installed in the Mpongwe Karst Area and the Kafubu and Kafulafuta Catchments Keywords: Upper Kafue, Zambia, Groundwater level measurement, River gauging Abstract A water level monitoring network was set up in the second half of 2016 by the Groundwater Resources Management Support Programme (GReSP) in a pilot area in the Zambian Copperbelt Province to assess the area’s available groundwater resources. The network will serve as basis for the development of a groundwater management plan. The area investigated covers the Kafubu and Kafulafuta catchments as well as the Mpongwe Karst area. The network comprises 14 groundwater monitoring stations and 9 river gauging stations. The technical details of these stations, including their location and the measurement equipment installed, are given in this report. Furthermore, the report describes the installation process and gives a brief overview of the measurement equipment used. -3- Table of Contents Summary .....................................................................................................................................3 Abbreviations .............................................................................................................................7 List of reports compiled by the project in Phase IV ...................................................................8 Executive Summary ....................................................................................................................9 1. Introduction ........................................................................................................................ 11 2. Monitoring methodology applied ...................................................................................... 12 2.1. Overview of the Monitoring Network Installed and Monitoring Activities Planned .. 12 2.2. Installation of the Monitoring Stations ...................................................................... 13 2.2.1. Installation of Groundwater Monitoring Stations ................................................... 13 2.2.2. Installation of River Gauging Stations ...................................................................... 16 2.3. Water Level monitoring .............................................................................................. 17 2.3.1. Automatic Registration of Water Levels by Data Loggers ....................................... 17 2.3.2. Manual Measurements of Water Levels .................................................................. 18 2.4. Streamflow Measurements ........................................................................................ 18 3. Specifications of the Surface Water monitoring stations .................................................. 20 3.1. Station N° 4_202 – Kafulafuta River at Great North Road ......................................... 20 3.2. Station N° 4_205 – Kafulafuta River In Ibenga ........................................................... 23 3.3. Station N° 4_245 – Kafubu River at Masaiti Pumping Station .................................... 26 3.4. Station N° 4_260 – Kafue River at Ndubeni ................................................................ 29 3.5. Station at Kafubu River in Ndola/Twapia ................................................................... 32 3.5.1. Damage and Rescue of Twapia Monitoring Station................................................. 35 3.5.2. Evaluation of Secured Data of Twapia Monitoring Station...................................... 36 3.6. Station at Kafulafuta River in Kasamba ...................................................................... 37 3.7. Station at Mpongwe River near Senseta .................................................................... 40 4. Specifications of the Groundwater monitoring stations .................................................... 43 4.1. Station at Ndubeni Mayeba ........................................................................................ 43 4.2. Station at Fiwale Mission ............................................................................................ 44 4.3. Station at Misundu Forest, Ndola ............................................................................... 45 4.4. Station at Lake Kashiba ............................................................................................... 46 4.5. Station at Kabya .......................................................................................................... 47 4.6. Station at Titibuke Primary School ............................................................................. 48 4.7. Station at Kambowa ................................................................................................... 49 4.8. Station at Zambeef Nampamba Farm in Mpongwe ................................................... 51 4.9. Station at Shingwa Primary School ............................................................................. 52 4.10. Station at Kasamba Community Borehole .................................................................. 53 4.11. Station at Kafubu Block B Primary School .................................................................. 54 4.12. Station at Ibenga Water Treatment Plant .................................................................. 57 4.13. Station at Forest close to Ibenga Water Treatment Plant .......................................... 58 5. References .......................................................................................................................... 59 -4- List of Figures Figure 1: Map of the monitoring network ............................................................................... 12 Figure 2: Handpump prepared for logger installation by lifting to a metal block. .................. 14 Figure 3: Installation of a logger at a handpump. ................................................................... 14 Figure 4: Inserting data logger attached into metal cable to a monitoring borehole. ............ 15 Figure 5: Preparation of former production borehole for monitoring.................................... 15 Figure 6: Installation of staff gauges. ...................................................................................... 16 Figure 7: HOBO® Logger used for automatic registration of water levels. ............................. 17 Figure 8: Reading out the logger data using an adapter and a HOBO® U-Shuttle. ................. 17 Figure 9: Manual measurement of water levels ..................................................................... 18 Figure 10: Streamflow measurement with the RiverSurveyor® at the Kafubu River. ............. 19 Figure 11: Aerial view on monitoring station 4_202. .............................................................. 21 Figure 12: Installed staff gauges at monitoring station 4_202. ............................................... 21 Figure 13: Benchmark at monitoring station 4_202. .............................................................. 22 Figure 14: Discharge measurement at monitoring station 4_202 using the OTT ADC. .......... 22 Figure 15: Aerial view on monitoring station 4_205. .............................................................. 24 Figure 16: Two of the four installed staff gauges at monitoring station 4_205. ..................... 24 Figure 17: Benchmark at monitoring station 4_205. .............................................................. 25 Figure 18: Discharge measurement at monitoring station 4_205 using the OTT ADC. .......... 25 Figure 19: Aerial view on monitoring station 4_245. .............................................................. 27 Figure 20: Monitoring station 4_245. ...................................................................................... 27 Figure 21: Benchmark (close to the wall, between plants) at monitoring station 4_245. ...... 28 Figure 22: Discharge measurement at monitoring station 4_245 using the RiverSurveyor®. 28 Figure 23: Aerial view on monitoring station 4_260. .............................................................. 30 Figure 24: Installation of staff gauge at monitoring station 4_260. ........................................ 30 Figure 25: Benchmark at monitoring station 4_260. .............................................................. 31 Figure 26: Discharge