FLOOD MONITORING AND ASSESSMENT SERVICES IN NIGERIA BY Mrs Hadiza - PowerPoint PPT Presentation

NIGERIA HYDROLOGICAL SERVICES AGENCY (NIHSA) FEDERAL MINISTRY OF WATER RESOURCES PRESENTATION ON FLOOD MONITORING AND ASSESSMENT SERVICES IN NIGERIA BY Mrs Hadiza Tukur AUGUST, 2019

FL FLOOD MONITORING AND ASSE SSESSM SSMENT SE SERVICES S IN NIGERIA Presentation Outline 1. 1. Introduction 2. 2. Flooding Events in Nigeria 3. 3. Activities of the Agency in Relation to Flood management in Nigeria 4. 4. NIHSA Services 5. 5. Other Government efforts to mitigate flood 6. 6. Challenges 7. 7. Needs 8. 8. Possible areas of collaboration to flood assessment and Management

NIHSA BACKGROUND • The Nigerian Hydrological agency is one of the major parastatal in the Federal Ministry of Water Resources, Nigeria. • Established in 2010 • MANDATE: • To provide services required for the assessment of the the Nation’s surface and ground water resources for efficient and sustainable management of water resource

FLOOD MONITORING AND ASSE FL SSESSM SSMENT SERVICES SE S IN NIGERIA 2. Activities of The Agency in Relation to Flood Management in Nigeria ü NIHSA primary function is to provide hydrological data and information on the location of water resources in time and space, their extent, dependability, quality and the possibilities of their utilization and control on a continuous basis. ü Flood and drought monitoring and forecasting related activities ü Operation and maintenance of stations nation-wide ü Groundwater exploration

FLOOD MONITORING AND ASSE FL SSESSM SSMENT SERVICES SE S IN NIGERIA 2. Activities of The Agency in Relation to Flood Management in Nigeria ü These activities are carried out by NIHSA through their five (5) technical departments which are: Engineering Hydrology, • • Hydrogeology, • Operational Hydrology, • Hydrogeophysics • Hydrogeoinformat ics and a service Department (Admin and Finance)

FLOOD MONITORING AND ASSESSMENT SERVICES IN NIGERIA

NIHSA Services Surface Water Monitoring System • NIHSA access surface water resources through observation and collection of data on river discharge, stage (height) and sediment transport from its hydrological network of stations across the country. • Nigeria has 273 hydrometric river gauging stations (WMO recommended is 482) • Twenty (27) are Automated River Discharge Measurement using the Manual gauge by NIHSA Staff

NIHSA Services Auto-Satellite DCP equipment maintenance River Discharge Measurement by exercise by NIHSA – Kainji Station NIHSA Staff

FL FLOOD MONITORING AND ASSE SSESSM SSMENT SE SERVICES S IN NIGERIA Hydrological Stations monitored by NIHSA

Existing Network Density of Hydrological Stations in Nigeria inline with WMO recommended density Hydrological Area (HA) Catchment Area Area Coverage Existing WMO Recommended (River Basin) (10 3 Km 2 ) Network Minimum Network Density per Density HA HA-1 Niger North Sokoto-Rima 135.1 44 32 47 HA-2 Niger Central Upper Niger, Lower 154.6 83 Niger HA-3 Upper Benue Upper Benue 156.5 49 73 HA-4 Lower Benue Lower Benue 74.5 31 46 HA-5 Niger South Anambra-Imo, Niger 53.9 31 51 Delta HA-6 Western Ogun-Oshun, Benin- 99.3 26 71 Littoral Owena HA-7 Eastern Littoral Cross River 57.4 22 26 HA-8 Chad Basin Chad Basin 178.5 35 100 Total 909.8 285 482

FL FLOOD MONITORING AND ASSE SSESSM SSMENT SE SERVICES S IN NIGERIA Telemetry Data Collection Platform Stations (DCPs)

NIHSA Services Automatic Weather observation station The Agency Installed (15) Automatic Weather Observation Stations in 8 hydrological areas of the country to complement the Nigeria Metrological Agency’s Station for the purpose of: Ø Monitoring the effects of climate charge on water resources. Ø Flood / drought monitoring Ø To replace the traditional version of the weather station

FL FLOOD MONITORING AND ASSE SSESSM SSMENT SE SERVICES S IN NIGERIA NIHSA Automatic Weather Observation system in Kabba Kogi State

NIHSA Services Monitoring for Environment and Security in Africa (MESA) • The project started in June 2014 as AMESD • The MESA station was installed in NIHSA headquarters in 2017. • Data from MESA station are used for flood forecasting, early warning and modeling for Annual flood outlook • It helps give the true picture of what happens on vegetation and rainfall .

FL FLOOD MONITORING AND ASSE SSESSM SSMENT SE SERVICES S IN NIGERIA MESA station at NIHSA Headquarters, Abuja

NIHSA Services Flood Early Warning System • NIHSA Flood Early Warning System is based on the regular collection of Meteorological and Surface Water data to Monitor Climatic Condition and Flooding event along the river channels. • The Flood Early Warning System is equipped with Siren which is triggered upon a given threshold to warn the riparian communities. • It enables the public to be warned en mass so that action can be taken to reduce the adverse effects of flooding.

NIHSA Services Flood Early Warning System (Cont’d) • It reduces exposure to flooding in real time. • NIHSA has installed Flood Early Warning System in Three (3) locations along the major rivers in Nigeria. It is located in: • Lokoja the confluence of River Niger and River Benue • Jiderebode Kebbi State Entry point of River Niger in Nigeria • Wuro bokki entry point of River Benue

FL FLOOD MONITORING AND ASSE SSESSM SSMENT SE SERVICES S IN NIGERIA NIHSA Flood Early Warning System

FLOOD MONITORING AND ASSESSMENT SERVICES IN NIGERIA – ANNUAL FLOOD OUTLOOK Ø Hydro-meteorological hazards and climate extremes such as (floods, drought, sand storm and dust storm, storm surge, land slide and forest fire, are increasing across the West African Region Ø The number of hydro-metrological disaster in West Africa has increased significantly since the 70s after the Sahelian drought. Ø In recent times they cause majority of loss of life and economic loses. Ø In Nigeria, hydrological extremes of flood and drought have caused loss of livelihoods and even lead to migration, crime and communal clashes.

FLOOD MONITORING AND ASSE FL SSESSM SSMENT SERVICES SE S IN NIGERIA 2. Flood Event in Nigeria Ø In 2012 Nigeria experienced an unprecedented flood that affected about 27 states of the federation causing 400 persons death and 2 million people displaced from their houses Ø The national emergency management agency (NEMA) estimated the total amount of loses as approximately N2.29 trillion in damaged properties and agricultural product.

NIHSA Services Annual flood outlook • The agency in line with its mandate among others, issue flood and drought forecast for management of hydrological hazards through Annual Flood Outlook publication • So far it has successfully produced 7 editions. • It records remarkable success in flood mitigation in Nigeria through its awareness campaign • The agency uses 2 models to simulate flood scenarios for forecast in 8 Hydrological Areas on the basis of local government areas.

NIHSA Services Annual flood outlook (Cont’d) The 2012 scenario have been used as a reference point (bench mark) for flood assessment The two models used by NIHSA are Geospatial Stream 2019 Annual Flood Outlook Presentation by the Honourable Minister for Water Resources Engr Flow model (GeoSFM) and Adamu Soil Water Assessment Tool (SWAT)

Evaluation of Previous Edition of AFO Ø The fall in the degree of S/N YEAR PERFORMANCE REMARK manifestation of flood disaster 1. 2013 70% Maiden edition from 2013 to 2018 is a success 2. 2014 63% Decreasing trend story arisen from positive 3. 2015 55% Decreasing trend response (proactive) measures 4. 2016 53% Decreasing trend that were put in place by 5. 2017 53% Decreasing trend government, stakeholders and 6. 2018 53% the citizens. 331 319 350 313 300 257 250 Number of LGAs 172 200 156 154 118 150 81 77 69 100 37 50 0 2013 2014 2015 2016 2017 2018 Year Predicted Occurred Linear (Occurred )

2019 Annual Flood Outlook 2019 Flood Risk Map

NIHSA Services Data used for the Annual Flood Outlook Includes • Daily flow records (stage and discharge) • Seasonal rainfall prediction(SRP by mint) • Daily, Monthly and Yearly rainfall records • Gridded satellitedaily rainfall data • Daily potential evapotranspiration (PST) Based on the data produced by Flood Early Warning System (FEWSNET) • MESA Products such as: NDVI, Soil characteristics and rainfall data.

NIHSA Services Data Bank / Hydrological Modeling Center - The objective of this project is to capture/retrieve and maintain all previous, present and future generated hydrological data/information in our hydrological areas and water related agencies - The Agency developed a Web-Based Database Management System (DBMs) - The agency also established Hydrological modeling center (to predict and simulate flood occurrence in the country).

NIHSA Services Data Bank / Hydrological Modeling Center - The Agency also has a websites and social media platform through which information can be shared with the general public and other stakeholders. - NIHSA website www.nihsa.gov.ng - Facebook: www.facebook.com/nihsa - Twitter: @nihsa.ng