Fig 1.
Climate hazards and the eight key risk sectors.
The colours in green represent the key risk sectors, while the colours in yellow represent the challenges, and the colours in pink represent the hazards, which are adopted from [18].
Fig 2.
The organisation of Nigeria’s governing structure and a representation of legislation, laws, and standards in Nigeria dealing with environmental issues.
Boxes outlined in dark green represent Nigeria’s governing structure, and sectoral ministries and departments are in lighter green. Yellow boxes represent the agencies, while the boxes outlined in blue represent regulations related to hydrological hazards. Boxes outlined in black represent regulations related to land cove.
Table 1.
The linkages between National Policy Documents and Risk Sectors.
Table 2.
The number of times each keyword appeared across the policy documents. SLR = Sea level rise, HR = High Rainfall, RF = River Flood, SS = Storm Surge, WT = Warming Trend, CV = Climate Variability, P = Population, D = Deforestation, U = Urbanisation, I = Industrialisation, A = Agriculture, IN= Infrastructure, ND = Niger Delta, C = Coast.
Table 3.
Frequency threshold and binary coding.
Fig 3.
Weighted Policy Pathways Illustrating Linkages among a).
Risk Sectors and the Policy Sector Coverage b) Policy Sector to Drivers and c) Policy Sector to Hazards. The flowlines represent the pathways through which specific policy areas align with risk-relevant issues across the study region.
Table 4.
Matrix table showing the frequency of keywords across the six national policy documents. Legend: Adaptation = A, Mitigation = M, Resilience = R, Vulnerability = V, Flood Protection = FP, Emission Reduction = ER, Adaptive Capacity = AC, Financial Capacity = FC, and Collaboration = C.
Fig 4.
Policy sectors and their coverage based on the number of measures addressing each theme towards the management of hydrological hazards across the NDR.
Legend: Adaptation = A, Mitigation = M, Resilience = R, Vulnerability = V, Flood Protection = FP, Emission Reduction = ER, Adaptive Capacity = AC, Financial Capacity = FC, and Collaboration = C.
Table 5.
Overview of how the six national policies document connectivity to manage hydrological hazards, noting the interconnections and combined methods needed across different sectors.
Table 6.
Summarizes the alignment matrix across the policy documents.