04/06/2026
NWRMA Strengthens National Hydrological Monitoring Systems
The National Water Resources Management Agency (NWRMA), through its Hydrological Services Department, has successfully completed the calibration, and optimization of hydrological monitoring stations across Sierra Leone. Key stations optimized include Konsho, Guma Dam, Daru, and Magburaka surface water monitoring stations and Bo, Kenema and Kailahun groundwater stations among others.
In a bid to restore and improve the operational efficiency, reliability, and accuracy of the monitoring stations, the team carried out several calibration, optimization and technical enhancement activities. These included the calibration and or replacement of faulty equipment, re-establishment of staff gauges, and the establishment of local datum and zero-gauge elevations.
Further, local datums were tied to river cross-sections, while river cross-sectional profiling was undertaken using an Acoustic Doppler Current Profiler (ADCP) to support hydrological assessment. Groundwater water levels were calibrated using deep meters and surface station bubbler offsets were calculated and verified to ensure measurement accuracy. In addition, damaged bubbler or***ce lines were repaired or replaced, station platforms were strengthened and reconstructed where necessary, and solar power system were replaced to improve energy reliability. Finally, all surface station equipment was configured and synchronized with staff gauge readings and groundwater sensors and data loggers were configured to ensure consistency and accuracy in data collection and transmission.
This intervention demonstrates NWRMA’s commitment to advancing evidence-based water resources management and safeguarding communities through improved hydrological data collection and monitoring systems.
Reliable Data. Better Decisions. Stronger Water Resources Management.