Next Article in Journal
Evaluation and Optimization of Agricultural Water Resources Carrying Capacity in Haihe River Basin, China
Previous Article in Journal
Assessing Hydrological Effects of Bioretention Cells for Urban Stormwater Runoff in Response to Climatic Changes
Open AccessArticle

Simplified Method for the Assessment of Siltation in Semiarid Reservoirs Using Satellite Imagery

1
Campus Professora Cinobelina Elvas, Federal University of Piauí, Bom Jesus 64900-000, Brazil
2
Department of Agricultural Engineering, Federal University of Ceará, Fortaleza 60450-760, Brazil
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Water 2019, 11(5), 998; https://doi.org/10.3390/w11050998
Received: 24 March 2019 / Revised: 28 April 2019 / Accepted: 1 May 2019 / Published: 13 May 2019
(This article belongs to the Section Hydrology)
The Brazilian semiarid region strongly depends on superficial reservoirs (one every 5 km 2 ) and hence is subject to the deleterious effects of siltation, which reduces water availability. This research proposed a method, simplified bathymetric surveying using remote sensing, for updating the morphological parameters of reservoirs. The study area was the Pentecoste reservoir (360 hm 3 ) in northeastern Brazil. The results were compared to the conventional bathymetric survey method, which demands more sampling points (235 compared to 1) and was assumed as reference. Siltation assessed through the proposed method was nearly twice as high as that observed through conventional surveys. The morphological parameters derived by both methods were used to assess the long-term water balance of the reservoir. The results show that the outflow diverged 30%, while the evaporated discharge and water availability diverged 10% between the methods. Therefore, in the conditions of the Brazilian semiarid region, the simplified method suffices to assess the water availability of reservoirs affected by silting. View Full-Text
Keywords: bathymetry; GIS; water yield discharge; elasticity bathymetry; GIS; water yield discharge; elasticity
Show Figures

Figure 1

MDPI and ACS Style

Lopes, J.W.B.; de Araújo, J.C. Simplified Method for the Assessment of Siltation in Semiarid Reservoirs Using Satellite Imagery. Water 2019, 11, 998.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop