TY  - JOUR
A1  - Mamede, George Leite
A1  - Guentner, Andreas
A1  - Medeiros, Pedro Henrique Augusto
A1  - de Araujo, Jose Carlos
A1  - Bronstert, Axel
T1  - Modeling the Effect of Multiple Reservoirs on Water and Sediment Dynamics in a Semiarid Catchment in Brazil
T2  - Journal of Hydrologic Engineering
N2  - Taking into account the climatic conditions of the semiarid region of Brazil, with its intermittent rivers and long periods of water scarcity, a dense network of surface reservoirs (on average one dam every 5 km(2)) of very different sizes has been built. The impact of such a network on water and sediment dynamics constitutes a remarkable challenge for hydrologists. The main objective of this work is to present a novel way of simulating water and sediment fluxes through such high-density reservoir networks, which enables the assessment of water and sediment retention in those structures. The new reservoir modeling approach has been coupled with the fully process-oriented and semidistributed hydrological WASA-SED model, which was tailored for semiarid hydroclimatological characteristics. This integrated modeling system was applied to the 933-km(2) Bengue catchment, located in semiarid northeastern Brazil, which has a network of 114 reservoirs with a wide range of surface areas (from 0.003 to 350 ha). The small reservoirs were grouped into size classes according to their storage capacity and a cascade routing scheme was applied to describe the upstream-downstream position of the classes; the large reservoirs were handled explicitly in the reservoir modeling approach. According to the model results, the proposed approach is capable of representing the water and sediment fluxes though the entire reservoir network with reasonable accuracy. In addition, the model shows that the dynamics of water and sediment within the Bengue catchment are strongly impacted by the presence of multiple reservoirs, which are able to retain approximately 21% of the generated runoff and almost 42% of the sediment yield of the catchment for the simulation period, from 2000 to 2012. (C) 2018 American Society of Civil Engineers.
KW  - Reservoir network
KW  - Semiarid catchment
KW  - Sediment retention
KW  - Water storage dynamic
Y1  - 2018
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/51455
SN  - 1084-0699
SN  - 1943-5584
VL  - 23
IS  - 12
PB  - American Society of Civil Engineers
CY  - Reston
ER  -