Representing a dense network of ponds and reservoirs in a semi-distributed dryland catchment model

Rabelo, Udinart Prata; Dietrich, Jörg; Costa, Antônio Celso Spı́nola; Simshäuser, Max Nino; Scholz, Fernanda E.; Nguyen, Van Tam; Neto, Iran Eduardo Lima

doi:10.1016/j.jhydrol.2021.127103

Cited by 35 publications

(39 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, our results indicated that simple power-law equations together with a complete-mix approach are sufficient to describe RT and TP in LSA. Such results are of the utmost importance, as the Brazilian northeast presents thousands of small reservoirs with similar characteristics to LSA (Lima Neto et al, 2011;Rabelo et al, 2021;Wiegand et al, 2021). Therefore, simple methodologies such as the one proposed in our study are needed to couple hydrologic and TP modelling at the basin scale and improve water resources management. )…”

Section: Resultsmentioning

confidence: 89%

Seasonal and interannual variability of residence time and total phosphorus in a small hypereutrophic lake in the Brazilian northeast

Rocha

Araújo

et al. 2022

WSA

View full text Add to dashboard Cite

This study evaluates the residence time (RT) and total phosphorus (TP) in a small hypereutrophic lake in the city of Fortaleza, Brazil. The results indicate that RT predicted by a complete-mix model is very similar (R² = 0.83) to that simulated with a 2-D hydrodynamic model (CE-QUAL-W2). Simple power-laws were fitted to describe RT and TP concentration at the lake inlet as functions of lake inflow, yielding correlations of R² = 0.84 and 0.70, respectively. The combination of these correlations with a complete-mix approach provided a comprehensive model that predicted TP values measured at the lake outlet reasonably well (R² = 0.60). In addition, a direct empirical correlation between simulated TP concentration and precipitation was also obtained. The simulations indicate a nearly periodic behaviour of RT and TP, with the seasonal variations being much higher than the interannual ones. Finally, an application of the model showed that a reduction of 99% of the input TP load was required to reach 100% compliance with the required water quality standards; this could be achieved by connecting the residences to the sewage network. The methodology proposed in this research can be easily applied to other lakes in the Brazilian northeast and extended to other tropical regions around the globe.

show abstract

Section: Resultsmentioning

confidence: 89%

Seasonal and interannual variability of residence time and total phosphorus in a small hypereutrophic lake in the Brazilian northeast

Rocha

Araújo

et al. 2022

WSA

View full text Add to dashboard Cite

show abstract

“…A representative example of this situation is Ceará, a 148,886 km² wide state in semi-arid Brazil, where it is estimated the presence of 105,813 reservoirs with more than 20 meters in length (FUNCEME et al, 2021). Ceará presents areas with reservoir concentration higher than 7 reservoirs per km 2 (Ribeiro , which greatly exceed other high concentration areas such as India (4.2 reservoirs/km 2 ) and Australia (6.1 reservoirs/km 2 ) (Rabelo et al, 2021).…”

Section: Study Areamentioning

confidence: 99%

“…In other words, DRN may enhance hydrological droughts' impacts when the basin is in a dry condition. A greater impact from DRN in dry conditions was found also in Rabelo et al (2021). Having a better knowledge of this phenomenon may help the implementation of short term drought preparedness measures when the reservoirs are below a threshold (e.g.…”

mentioning

confidence: 94%

See 1 more Smart Citation

The influence of small reservoirs on hydrological drought propagation in space and time

Colombo

Neto

Oel

et al. 2022

Preprint

View full text Add to dashboard Cite

To increase drought preparedness in semi-arid regions many small and medium reservoirs have been built in recent decades. Together these reservoirs form a Dense Reservoir Network (DRN) and its presence generates numerous challenges for water management. Most of the reservoirs that constitute the network are unmonitored and unregistered, posing questions on their cumulative effects on strategic reservoirs and water distribution at watershed scale. Their influence on hydrological drought propagation is thus largely unexplored. The objective of this study is then to assess the DRN effects on droughts both in time and space. This study utilized a mesoscale semi-distributed hydrological model to reproduce the DRN in a large-scale tropical semiarid watershed (19,530 km 2 ), which presents both a network of large strategic reservoirs and a DRN. To investigate the effects in time and space generated by the network's presence, the differences between multiple network scenarios were analyzed. Results show that the presence of the DRN accelerates the transition from meteorological to hydrological drought phases by 20% on average and slows down the recharge in strategic reservoirs by 25%, leading to a 12% increase of periods in hydrological drought conditions in a highly strategic basin and 26% without strategic reservoirs. In space, the DRN shifts upstream the basin's water storage capacity by 8%, but when both large and small reservoirs are present the stored volume distribution behavior is not straightforward. The findings confirm the need to consider small reservoirs when addressing drought management policies at regional scale.

show abstract

“…The key periods (KPs) and key areas (KAs) of ecological flow deficit in the Hanjiang River basin were quantitatively identified, and a new method for developing rules for adaptive regulation of water resources was proposed based on the coupling analysis of key periods‐areas of the ecological flow deficit in the Hanjiang River basin. The present study is able to calculate the values of ecological flow surplus and deficit of each sub‐basin in multi‐reservoir basins based on coupled SWAT‐reservoir model (Kim et al, 2021; Rabelo et al, 2021; Wu et al, 2020), and visually display its temporal and spatial distribution, and then determine the areas and periods of priority regulation of water resources in the basin according to the degree of ecological flow deficit. This method can be applied to basins with dams or reservoirs in the globe, to ensure ecological water demand and rational allocation of water resources through adaptive management (Ayele et al, 2022; Farshid et al, 2021; Mao et al, 2020; Sedighkia & Abdoli, 2022; Zhang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Adaptive regulation based on the spatio‐temporal distribution of ecological flow surplus and deficit in the Hanjiang River basin

Song

Zhuang

et al. 2022

Ecohydrology

View full text Add to dashboard Cite

Ecological flow has attracted considerable attention because intensive dam construction can cause changes in the hydrological situation and subsequent ecological environment problems. In the Hanjiang River basin, 15 cascade reservoirs are due to become operational in the main stream in the coming years. In this study, the calculation method of ecological flow surplus and deficit was proposed, and the key periods (KPs) and key areas (KAs) of ecological flow deficits were identified. Adaptive regulation strategies were proposed based on a new method. Results show that (1) the wet and normal years are in a state of ecological surplus. In the dry year, there is an ecological flow deficit of 370 million m 3 . The off-stream ecological water shortage is at its most serious in June. In the river channel, the ecological flow deficit usually appears in the winter. The Xiantao section in the lower reaches has a deficit every month in the typical water years. (2) In the off-stream region, the KPs cover months 6 to 9, and the KAs are the southeastern Hanzhong plain, Shiyan City, southeastern Nanyang basin, and the midwest of Xiangyang City. In the river channel, the KPs cover months 12 to 2 above the Shayang section, while in the downstream Xiantao section KA, the KP covers the whole year. The cooperative analysis of KPs and KAs can effectively improve the pertinence of watershed ecological flow regulation.

show abstract

Representing a dense network of ponds and reservoirs in a semi-distributed dryland catchment model

Cited by 35 publications

References 63 publications

Seasonal and interannual variability of residence time and total phosphorus in a small hypereutrophic lake in the Brazilian northeast

Seasonal and interannual variability of residence time and total phosphorus in a small hypereutrophic lake in the Brazilian northeast

The influence of small reservoirs on hydrological drought propagation in space and time

Adaptive regulation based on the spatio‐temporal distribution of ecological flow surplus and deficit in the Hanjiang River basin

Contact Info

Product

Resources

About