Assessment of freshwater discharge into a coastal bay through multi-basin ensemble hydrological modelling

Lavenne, Alban de; Cudennec, Christophe

doi:10.1016/j.scitotenv.2019.02.387

Cited by 11 publications

(7 citation statements)

References 53 publications

(51 reference statements)

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“…This selection criterion resulted in 221, 186 and 185 catchments for nitrate, SRP and TP, respectively. Because existing discharge monitoring stations in Brittany are not necessarily located at the water‐quality monitoring points, we used the geomorphology‐based SIMFEN model to estimate daily discharge at the outlet of each of our study catchments (de Lavenne & Cudennec, 2019). Developed for Brittany, SIMFEN predicts discharge in ungauged catchments by transposing hydrographs from neighbouring gauged ‘donor’ catchments by convoluting a ‘net rainfall’ (i.e., the water flowing through the hillslope‐river interface) through the river network of the ungauged catchments (de Lavenne & Cudennec, 2019).…”

Section: Methodsmentioning

confidence: 99%

Landscape spatial configuration influences phosphorus but not nitrate concentrations in agricultural headwater catchments

Dupas

Casquin

Durand

et al. 2023

Hydrological Processes

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Landscape organized (or structured) heterogeneity influences hydrological and biogeochemical patterns across space and time. We developed landscape indices that describe the spatial configuration of nutrient sources and sinks as a function of their hydrological distance to the stream (lateral dimension) or to the outlet (longitudinal dimension) and their intersection with flow-accumulation areas. Using monthly nitrate, total phosphorus (TP), soluble reactive phosphorus (SRP) and daily discharge (Q) data from 221 rural catchments (1-300 km 2 ) from 2010-2020, we observed higher variability in flow-weighted mean concentrations in smaller catchments than in larger ones. The variability in landscape configurations also decreased with increasing catchment size. A landscape configuration index, calculated as mean arable land use weighted by spatial data on hydrological distance and flow accumulation, improved prediction of TP and SRP, but not nitrate, compared to the unweighted mean arable land use. We conclude that landscape configuration influences phosphorus transfer more than nitrate transfer, and that flow-accumulation zones and riparian areas are critical source areas for TP and SRP, respectively. By contrast, landscape spatial configuration in the lateral (upslope-downslope) and longitudinal (upstreamdownstream) dimensions did not have an identifiable influence on nutrients temporal dynamics. The indices developed in this study can help design landscapes that minimize diffuse phosphorus losses to streams and show that landscape management is not a first order control for nitrate losses.

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Section: Methodsmentioning

confidence: 99%

Landscape spatial configuration influences phosphorus but not nitrate concentrations in agricultural headwater catchments

Dupas

Casquin

Durand

et al. 2023

Hydrological Processes

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“…The simu-lated discharge time series at the outlet of a similar target catchment (in particular nested or neighbouring) is then obtained by transposition from the donor catchment, then the convolution with the corresponding transfer function as deduced from its observed geomorphometry and a robust assumption on the streamflow velocity. This geomorphologybased hydrological approach (Cudennec, 2007) has been tested in different well described contexts with pseudoungauged strategies: semi-arid Tunisia (Boudhraâ et al, 2009(Boudhraâ et al, , 2018, temperate oceanic France (de Lavenne et al, 2015(de Lavenne et al, , 2016 and pluvio-nival Canadian Québec (Ecrepont et al, 2019). Robustness has been assessed regarding the calibration configuration (Boudhraâ et al, 2018;de Lavenne et al, 2016) and the resolution of the digital elevation model used as a geomorphometric reference (Ecrepont and Cudennec, 2020).…”

Section: Simfen: a Web Service To Make A Pub Modelling Approach Avail...mentioning

confidence: 99%

Uptake by end-users of a PUB approach made available as a Web Service

Loree,

Squividant,

Launay

et al. 2024

Proc. IAHS

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Abstract. A consolidated geomorphology-based approach for discharge hydrograph Prediction in Ungauged Basins (PUB) through deconvolution of discharge signals from gauged donor catchments, their transposition and their convolution towards target outlets, has been made available online to end-users through a Web Service (Web Processing Service Application Programming Interface – WPS API) for the synoptic peninsular region of Brittany, France. In the spirit of hydrological services, the SIMFEN Web Service allows anyone to execute the hydrological modelling online through OGC® interoperability standards; collection of public hydrometric data; connection to a pre-existing Web Service for geomorphometric analysis; and online visualization. Thanks to tangible indicators, we here show how the users' community is actually active in using the Web Service, i.e. in uptaking the recent science-operational translation of a scientific development into a Service.

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“…Consequently, the soil texture of the wetland changed, that is, proportion of soil gravel increased, and the water retention capacity decreased. To restore the degraded wetland ecosystem and its function (Ren et al 2016;Lavenne et al 2019), P. deltoides trees were removed from the Dongting Lake area, thus ecological restoration on the P. deltoides cutting slash is paramount. Therefore, basic theoretical research to provide guidance for the restoration should be carries out.…”

Section: Introductionmentioning

confidence: 99%

“…19.6(Chen et al 2018) and merged by FLASH version1.2.7 (Tanja et al 2011). The optimized sequences were then clustered into operational taxonomic units (OTUs) using UPARSE 7.1(Edgar et al 2013) with a sequence similarity level of 97%.…”

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confidence: 99%

Rhizosphere Microorganisms and Soil Physicochemical Properties of Restored Wetland Plant Communities at Cutting Slash of Populus deltoides in Dongting Lake

et al. 2023

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Carex spp. and Artemisia selengensis communities are typical renewal wetland plant communities at cutting slash of Populus deltoides. However, how rhizosphere microorganisms and soil factors interact during natural restoration in plant communities is unknown. Plots containing Carex spp. and Artemisia selengensis in the slash area were investigated, and the P. deltoides plantation area at a lake shore was sampled as a control. The results revealed that the richness and diversity indices of the fungal community in the Carex spp. community were higher than those in the A. selengensis and P. deltoides undergrowth communities. Ascomycota was the dominant phylum in the soil of Carex spp. community whereas Basidiomycota was the dominant phylum in the A. selengensis community. The richness and diversity indices of the rhizosphere bacterial community in the control were higher than those in communities of Carex spp. and A. Selengensis. Proteobacteria and Actinobacteria were the dominant phyla of the rhizosphere bacterial community in the control plot. Soil water content (WC), proportion of clay (CY), and nutrient content, as well as catalase activity (CAT) in the soil of Carex spp. community were the highest, whereas those in the control were the lowest. Conversely, the bulk density (BK) and proportion of gravel in the control plot were the highest. RDA found that the CY, organic matter (OM), ammonium nitrogen (AN) and nitrate nitrogen (NN) content in the soil were the key factors affecting the structure and composition of the rhizosphere microbial community.

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Assessment of freshwater discharge into a coastal bay through multi-basin ensemble hydrological modelling

Cited by 11 publications

References 53 publications

Landscape spatial configuration influences phosphorus but not nitrate concentrations in agricultural headwater catchments

Landscape spatial configuration influences phosphorus but not nitrate concentrations in agricultural headwater catchments

Uptake by end-users of a PUB approach made available as a Web Service

Rhizosphere Microorganisms and Soil Physicochemical Properties of Restored Wetland Plant Communities at Cutting Slash of Populus deltoides in Dongting Lake

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