Impacts of sediment retention by dams on delta shoreline recession : evidences from the Krishna and Godavari deltas, India

Auteur(s) et Affiliation(s)

NAGESWARA RAO, K.

Dep. of Geo-Engineering, Andhra Univ., Visakhapatnam, Inde

SUBRAELU, P.

Dep. of Geo-Engineering, Andhra Univ., Visakhapatnam, Inde

NAGA KUMAR, K.C.V.

Dep. of Geo-Engineering, Andhra Univ., Visakhapatnam, Inde

DEMUDU, G.

Dep. of Geo-Engineering, Andhra Univ., Visakhapatnam, Inde

HEMA MALINI, B.

Dep. of Geography, Andhra Univ., Visakhapatnam, Inde

RAJAWAT, A.S.

Marine and Earth Sciences Group, Space Applications Centre, Ahmedabad, Inde

AJAI, A.

Marine and Earth Sciences Group, Space Applications Centre, Ahmedabad, Inde

Description :
A comparison of data on annual sediment loads recorded along the Krishna and Godavari Rivers showed consistently lower sediment quantities at the locations downstream of dams than at their upstream counterparts. Reports based on bathymetric surveys revealed considerable reduction in the storage capacities of reservoirs behind such dams. Apparently sediment retention at the dams is the main reason for the pronounced coastal erosion (revealed by the analysis of multi-date satellite imagery and maps) along the Krishna and Godavari deltas during the past four decades, which is coeval to the hectic dam construction activity in these river basins.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 7, p. 817-827, nombre de pages : 11, Références bibliographiques : 54 ref.

Date :
2010

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais