Hydrology · Rivers · Water-Resources Engineering
Field-grounded analysis of how water moves, where it floods, and how catchments are managed and restored, written for practitioners, students, and the engineering-curious.
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Explainer
1% AEP · recurrence interval
A 100-year flood is not a flood that arrives once a century. It is a one-percent annual chance. We walk through return periods, annual exceedance probability, how the number is estimated, and why a changing climate complicates it.
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Channel form, sediment transport, planform change, and how rivers shape — and are shaped by — the landscape over time.
Read this topicFlood frequency, inundation mapping, return periods, and the communication of uncertainty in hazard and exposure.
Read this topicAllocation, reservoirs, abstraction, drought planning, and the trade-offs that govern how catchments share a finite resource.
Browse all postsRe-meandering, floodplain reconnection, fish passage, and monitoring whether ecological interventions actually hold.
Read this topicGauging, rating curves, statistical models, and the modelling tools — from simple to numerical — used across the field.
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Why slope, sediment, discharge variability, and bank strength decide whether a river holds one thread or splits into a braid.
What the term actually means, why it can happen twice in a decade, and how the one-percent annual chance is estimated.
How reconnected floodplains and wetlands lower flood peaks, where they fall short, and why catchment condition matters.