In this paper we investigate the mechanism of internal erosion caused in the right abutment of the Shahghasem dam’s spillway. Shahghasem dam is an earthen dam located in Yasouj, in southwest of Iran. A significant hole and pipe have been observed in the corner of the right abutment from upstream view. The foundation is Marlstone, which has low cohesion and susceptible for internal erosion and p...

Over the past decades, significant advances have been achieved in hydraulic structures for dams, namely water release such as spillway weirs, chutes, and energy dissipators. This editorial presents a brief overview of eleven papers this Special Issue, Advances Spillway Hydraulics: From Theory to Practice, frames them current research trends. Issue explores following topics: inlet structures, tr...

This work investigates the routing effect provided by an artificial reservoir to a double-peak flood of a given return period. The present paper introduces a dimensionless form of the reservoir balance equation that describes the hydrologic-hydraulic processes that may occur and allows for the evaluation of the reservoir routing coefficient (RC). Exploiting this equation, an extensive sensitivi...

In this paper we present parallel 2D and 3D finite element computation of unsteady, incompressible free-surface flows. The computations are based on the DeformableSpatial-Domain/Stabilized Space-Time (DSD/SST) finite element formulation, which takes automatically into account the motion of the free surface. The free-surface height is governed by a kinematic free-surface condition, which is also...

Dams and the water systems they support must be monitored, maintained, repaired when necessary so can continue to provide benefits communities serve. This study presents methods results from a robotic crawler-based ground penetrating radar (GPR) inspection of rehabilitated concrete hydroelectric dam spillway located in Alabama, USA. spillway, which was recently inspected repaired, showed eviden...

Large wood increases the morphological and hydraulic complexity of rivers, yet it may block modify flood discharge capacity structures. To assess related risk, blockage probability estimation for structures such as reservoir spillways is needed. This work presents unstudied parameters large with a reservoir-type approach flow, where inflow velocity has negligible magnitude. Experiments were con...