River System Behaviour Effects on Flood Risk

A risk-based safety approach is indispensable to support decision-making on flood protection strategies and measures. Hitherto the effects of river system behaviour on flood risk have usually been neglected. River system behaviour refers to the fact that the flood risk (or safety) of a particular area may depend on the safety of other adjoining...

Estimating arsenic concentrations in Bihar (India), a geostatistical approach using DEM data

Bihar is a densely populated area located in the Middle Ganga Plain (MGP) in India. The Ganges' sinuous nature in the MGP created a vast amount of point bar structures within the floodplain. In 2003 it was discovered that high arsenic concentrations are present in the shallow groundwater aquifers, especially in the elevated point bars. According...

Fluvial River Regime in Disturbed River Systems: A Case Study of Evolution of the Middle Yangtze River in Post-TGD (Three Gorges Dam), China

The fluvial river is a kind of open system that can interact with its outside environments and give response to disturbance from outside on the earth. It can adjust itself to the disturbances outside the system and reflects new characteristics in the process of reaching a new equilibrium. The TGD (Three Gorges Dam) constructed at the Yangtze...

On the origin of crevasse-splay amalgamation in the Huesca fluvial fan (Ebro Basin, Spain): Implications for connectivity in low net-to-gross fluvial deposits

Floodplain deposits are abundant in low-gradient dryland river systems, but their contribution to connected reservoir volumes has not yet been fully acknowledged due to their poor detectability with typical wireline log suites and relatively-lower reservoir quality. This study presents an analysis of stacked crevasse splays in the distal part of...

The key role of crevasse splays in prograding river systems: Analysis of evolving floodplain accommodation and its implications for architecture and reservoir potential

A generic life cycle applies to crevasse splays in non-degradational fluvial systems, typically ending in healing and abandonment. Crevasse-splay channels adjust to a graded equilibrium profile through proximal erosion and distal deposition, with their distal termini acting as a (prograding) local base level. When proximal incision advances to...

Water Flow Behavior and Storage Potential of the Semi-Arid Ephemeral River System in the Mara Basin of Kenya

Alluvial corridors of ephemeral river systems provide viable opportunities for natural water storage in dry lands. Whilst alluvial corridors are widely recognized as water buffers, particularly for areas experiencing constant water scarcity, little research has been undertaken in Sub-Saharan Africa to explore their hydrological variability...

Flood risk analysis of embanked river systems: Probabilistic systems approaches for the Rhine and Po rivers

Flood risk analysis focused on small sections or regions of embanked systems ignores the dy-namics of large-scale floods through time and space. Resulting measures are oftentimes inef-ficient due to an over estimation of risk or be-cause they simply transfer risk downstream due to increased localised protection upstream. This present work...

Dryland avulsion sequences: Insights from data-model comparison of a terminal dryland river system

An advection–diffusion model of fluvial processes was used to analyze the stratigraphic expression of avulsions in terminal river systems and understand their control on basin-fill architecture. The initial and boundary conditions of the model runs (i.e., catchment area, smoothed initial topographic surface, grain-size distribution and...

A River Reborn: An explorative landscape architecture design focussed on restoring natural river dynamics for the Nile River Basin

The River Nile has been a lifeline for northeastern Africa for thousands of years, supporting the growth of civilization, agriculture, and trade. The history of the Nile can be traced back to ancient times. The fertile banks of the Nile have supported the civilization of the ancient Egyptians. Since Egypt received almost no rain, the ancient...