Human utilization of mega-deltas: the importance of tidally modulated ground surface elevation

Abstract

Human development of mega-deltas is influenced by the elevation of delta ground surface. The elevation, modulated by the largest tidal range, influences the inundation pattern during storm surges, or the degree of risk in the presence of a sea dyke. However, the tidal modulation may be interrupted by nature or human induced subsidence or sediment starvation. Thus, the dynamics of the elevation should be studied in order to optimize the techniques to maintain the tidally modulated elevation. Furthermore, appropriate engineering schemes may be adopted to improve the deltaic geomorphological condition.