Development of a continuous soil moisture accounting procedure for curve number methodology and its behaviour with different evapotranspiration methods

2008 ◽  
Vol 22 (13) ◽  
pp. 2114-2121 ◽  
Author(s):  
N. Kannan ◽  
C. Santhi ◽  
J. R. Williams ◽  
J. G. Arnold
2007 ◽  
Vol 21 (21) ◽  
pp. 2872-2881 ◽  
Author(s):  
R. K. Sahu ◽  
S. K. Mishra ◽  
T. I. Eldho ◽  
M. K. Jain

2015 ◽  
Vol 51 (1) ◽  
pp. 506-523 ◽  
Author(s):  
Simon A. Mathias ◽  
Todd H. Skaggs ◽  
Simon A. Quinn ◽  
Sorcha N. C. Egan ◽  
Lucy E. Finch ◽  
...  

Author(s):  
Erika Lira da Silva ◽  
Allan Sarmento Vieira

Objetivou-se realizar uma simulação integrada nos reservatórios Engenheiro Ávidos e São Gonçalo, localizados, na Sub-bacia do Alto Piranhas no Estado da Paraíba, utilizando o modelo de rede de fluxo Acquanet. Utilizou-se o modelo tipo transformação chuva-vazão SMAP (Soil Moisture Accounting Procedure) para complementar a série de vazões naturais no período de 2010 a 2016. Assim a simulação realizada considerou uma série histórica de 1962 a 2016, com um cenário futuro onde foram adotados valores das demandas projetadas para o ano de 2032. Analisando a parte operacional dos reservatórios foi observado, no período simulado, que os mesmos atingiram seu volume máximo em muitos meses; na maioria dos períodos o volume meta foi respeitado; o volume mínimo foi atingido em alguns momentos devido aos baixos índices pluviométricos, fato que se intensificou nos últimos anos. Quanto às demandas, o abastecimento humano e dessedentação apresentaram confiabilidade acima dos 90%, já para a irrigação e indústria, o número de falhas foi maior. No cenário futuro, os resultados tiveram uma representação diferente, em poucos momentos chegaram ao volume máximo, por muitos meses operaram no volume mínimo, não conseguindo atender ao requerimento operacional do volume meta, e consequentemente o atendimento às demandas também não foi satisfatório. As falhas ocorreram no abastecimento humano e animal nos dois reservatórios, onde a confiabilidade ficou acima de 70%, e as demandas irrigação e indústria apresentaram um grande déficit de atendimento.


2010 ◽  
Vol 25 (4) ◽  
pp. 561-579 ◽  
Author(s):  
Dilip G. Durbude ◽  
Manoj K. Jain ◽  
Surendra K. Mishra

2021 ◽  
Vol 29 (7) ◽  
pp. 2411-2428
Author(s):  
Robin K. Weatherl ◽  
Maria J. Henao Salgado ◽  
Maximilian Ramgraber ◽  
Christian Moeck ◽  
Mario Schirmer

AbstractLand-use changes often have significant impact on the water cycle, including changing groundwater/surface-water interactions, modifying groundwater recharge zones, and increasing risk of contamination. Surface runoff in particular is significantly impacted by land cover. As surface runoff can act as a carrier for contaminants found at the surface, it is important to characterize runoff dynamics in anthropogenic environments. In this study, the relationship between surface runoff and groundwater recharge in urban areas is explored using a top-down water balance approach. Two empirical models were used to estimate runoff: (1) an updated, advanced method based on curve number, followed by (2) bivariate hydrograph separation. Modifications were added to each method in an attempt to better capture continuous soil-moisture processes and explicitly account for runoff from impervious surfaces. Differences between the resulting runoff estimates shed light on the complexity of the rainfall–runoff relationship, and highlight the importance of understanding soil-moisture dynamics and their control on hydro(geo)logical responses. These results were then used as input in a water balance to calculate groundwater recharge. Two approaches were used to assess the accuracy of these groundwater balance estimates: (1) comparison to calculations of groundwater recharge using the calibrated conceptual HBV Light model, and (2) comparison to groundwater recharge estimates from physically similar catchments in Switzerland that are found in the literature. In all cases, recharge is estimated at approximately 40–45% of annual precipitation. These conditions were found to closely echo those results from Swiss catchments of similar characteristics.


Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2202
Author(s):  
Chanyu Yang ◽  
Fiachra E. O’Loughlin

Owing to a scarcity of in situ streamflow data in ungauged or poorly gauged basins, remote sensing data is an ideal alternative. It offers a valuable perspective into the dynamic patterns that can be difficult to examine in detail with point measurements. For hydrology, soil moisture is one of the pivotal variables which dominates the partitioning of the water and energy budgets. In this study, nine Irish catchments were used to demonstrate the feasibility of using remotely sensed soil moisture for discharge prediction in ungagged basins. Using the conceptual hydrological model “Soil Moisture Accounting and Routing for Transport” (SMART), behavioural parameter sets (BPS) were selected using two different objective functions: the Nash Sutcliffe Efficiency (NSE) and Coefficient of Determination (R2) for the calibration period. Good NSE scores were obtained from hydrographs produced using the satellite soil moisture BPS. While the mean performance shows the feasibility of using remotely sensed soil moisture, some outliers result in negative NSE scores. This highlights that care needs to be taken with parameterization of hydrological models using remotely sensed soil moisture for ungauged basin.


1988 ◽  
Vol 19 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Lotta Andersson

Soil moisture dynamics in the Velen drainage basin (Sweden) were analyzed in order to assess the degree of and the reasons for spatial variation in basin behaviour. The main tool was a modified version of the soil moisture accounting routine in the conceptual runoff model HBV, optimized against neutron probe field data. Simulated soil moisture dynamics, interception and percolation rates agreed well with measurements and other calculations. Integration of simulated evapotranspiration from sites with different characteristics agreed well with water balance computations for the area. It was shown that unsaturated flow through macropores probably occurred after heavy rainstorms. During spring, evapotranspiration was limited to values below the potential (Penmans equation) even at times when no soil moisture deficit existed. Soil moisture differences between forest and grassland (including a deforested site) were, during summer, mainly attributed to differences in the root distribution with depth. The effect of interception on the total evapotranspiration rates was only significant during periods when transpiration demands were low. Soil moisture differences between forest sites were mainly attributed to topography but variations in soil characteristics and root distribution had to be considered, especially during dry periods.


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