Comparison of two different approaches of sensitivity analysis

Lenhart, T.; Eckhardt, Klaus; Fohrer, Nicola; Frede, H. G.

doi:10.1016/s1474-7065(02)00049-9

Cited by 479 publications

(315 citation statements)

References 7 publications

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“…This process of calibration of SWAT, especially auto-calibrating algorithms, including the sensitivity analysis of parameters, has been the subject of many hydrological studies (Eckhardt and Arnold, 2001;Benaman et al, 2005;White and Chaubey, 2005;Cao et al, 2006;Bekele and Nicklow, 2007;Kannan et al, 2007). For example, Lenhart et al (2002) conducted a sensitivity analysis in SWAT whereby two approaches were considered as equivalent: one was to change the value of a given parameter by a fixed percentage of the initial value (Lenhart et al, 2002;White and Chaubey, 2005), and the other was to vary it by a fixed percentage of the valid parameter range (Lenhart et al, 2002). In both sensitivity analysis approaches, the greatest importance was attributed to soil parameters.…”

Section: G Wang and J Xiamentioning

confidence: 99%

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Improvement of SWAT2000 modelling to assess the impact of dams and sluices on streamflow in the Huai River basin of China

Wang

Xia

2010

Hydrological Processes

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Abstract:Hydrological simulation and assessment in a dam-sluice regulated river basin are a complex and challenging issue. In this article, an improved SWAT2000 modelling system was developed that incorporated the Shuffled complex evolution (SCE-UA) optimization algorithm and the multi-site and multi-objective calibration strategy. The implication of multi-objective is different for different types of outlets, i.e. streamflow for an ordinary outlet, inflow for a sluice, and water storage for a reservoir. Model parameters were redefined to improve model simulations. The surface runoff lag time (SURLAG) was extended as a spatially distributed parameter, and a correction coefficient was introduced to modify the saturated hydraulic conductivity. The modelling system was then applied to the Huai River basin of China under various climatic conditions, including a very dry year (1999), a dry year (1981), an average year (1971), and wet year (1991). In all, 26 dams and 35 sluices were considered, among which about 20 dams/sluices were used for model calibration. The impact assessment primarily focused on the very dry year (1999). The results indicated that the released water from large reservoirs was blocked in the river channels by sluices located downstream. In the very dry year, the dam-sluice operations could result in an increase of the runoff volume during the non-flood season and a decrease in runoff during the flood season, but the changing magnitude during the non-flood season was much greater. An important conclusion of this case study is that the sluices in the Sha-Yin branch located in the north region and the dams in the southern mountainous region above the Wangjiaba Hydrological Station have played the most significant role in regulating the streamflow of the entire river basin. The methods addressed in this article can simulate hydrological regime in the river basins regulated by dams and sluices under different climatic conditions at the whole-watershed scale.

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Section: G Wang and J Xiamentioning

confidence: 99%

“…The redefined three parameters are related to the spatially distributed flow routing and the sensitive soil parameters (Lenhart et al, 2002). They are described as follows.…”

Section: Selected and Redefined Parameters For Calibrationmentioning

confidence: 99%

Improvement of SWAT2000 modelling to assess the impact of dams and sluices on streamflow in the Huai River basin of China

Wang

Xia

2010

Hydrological Processes

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“…Instead, a negative value implies that the increase of input yields a decrease of the output. The sensitivity index was averaged for the whole simulation period and the sensitivity of the model output to each tested input parameter was ranked according to Table 3 as suggested by [54]. …”

Section: Sensitivity Analysismentioning

confidence: 99%

Impact of Infiltration Process Modeling on Soil Water Content Simulations for Irrigation Management

Feki

Ravazzani

Ceppi

et al. 2018

Water

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Abstract:The uncertainty in a hydrological model, due to its structure or implemented input parameters, affects the accuracy of simulations that are usually used for important applications such as drought predictions, flood risk assessment, irrigation scheduling, ground water recharge and contamination. Several models describing soil infiltration processes have been developed. Some are analytical, while others implement numerical solutions of the Richards' equation. The objective of this work was to assess the impact of infiltration process modeling on soil water content simulations. For this study, different infiltration models were included within FEST-WB (Flash Flood Event-based Spatially-distributed rainfall-runoff Transformations-Water Balance) distributed hydrological model (SCS-CN, Green and Ampt, Philip and Ross solution). Performances of implemented infiltration models in simulating soil water content were evaluated against observations acquired in the experimental site located in a maize field in northern Italy. Soil water content was monitored together with continuous measurements of meteorological data. A sensitivity analysis was performed to assess the most important parameters governing infiltration process in the different models tested. A comparison of soil water content simulations show that Ross solution allowed the description of soil moisture variation along the vertical, but simpler lumped models provide sufficient accuracy when properly calibrated.

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“…Fifteen sensitive parameters (six hydrologic parameters and nine water quality parameters) that may have a potential influence on river flow and water quality were selected (Table 2) (Arnold et al 1998;Eckhardt and Arnold 2001;Lenhart et al 2002;van Griensven et al 2006;Bärlund et al 2007). The ranges of these parameters were obtained from the SWAT manual (Neitsch et al 2002 Several evaluation indices, including the relative error (re), correlation coefficient (r), and Nash-Sutcliffe coefficient (NSEC), were used to evaluate the model performance (Romanowicz et al 2005) (Table 3).…”

Section: Model Evaluationmentioning

confidence: 99%

“…N and P), climate change impact, sensitivity, and calibration and uncertainty analysis (Gassman et al 2007). After more than 10 years of development and improvement, some modified SWAT models have emerged, with notable examples including SWAT-G (Lenhart et al 2002), Extended SWAT (ESWAT) Bauwens 2003, 2005), and Soil and Water Integrated Model (SWIM) (Krysanova et al 1998(Krysanova et al , 2005. Wang et al (2008) developed several auxiliary tools for SWAT, such as the water quantity analysis tool, parameter calibration tool, scenario analysis tool, and result display interface, which are very useful to overcome the limitation of AVSWAT2000.…”

Section: Introductionmentioning

confidence: 99%

Water quantity and quality optimization modeling of dams operation based on SWAT in Wenyu River Catchment, China

Zhang

Xia

Chen

et al. 2010

Environ Monit Assess

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Water quantity and quality joint operation is a new mode in the present dams' operation research. It has become a hot topic in governmental efforts toward integrated basin improvement. This paper coupled a water quantity and quality joint operation model (QCmode) and genetic algorithm with Soil and Water Assessment Tool (SWAT). Together, these tools were used to explore a reasonable operation of dams and floodgates at the basin scale. Wenyu River Catchment, a key area in Beijing, was selected as the case study. Results showed that the couThese authors contributed equally to this work. pled water quantity and quality model of Wenyu River Catchment more realistically simulates the process of water quantity and quality control by dams and floodgates. This integrated model provides the foundation for research of water quantity and quality optimization on dam operation in Wenyu River Catchment. The results of this modeling also suggest that current water quality of Wenyu River will improve following the implementation of the optimized operation of the main dams and floodgates. By pollution control and water quantity and quality joint operation of dams and floodgates, water quality of Wenyu river will change significantly, and the available water resources will increase by 134%, 32%, 17%, and 82% at the downstream sites of Sha River Reservoir, Lutong Floodgate, Xinpu Floodgate, and Weigou Floodgate, respectively. The water quantity and quality joint operation of dams will play an active role in improving water quality and water use efficiency in Wenyu River Basin. The research will provide the technical support for water pollution control and ecological restoration in Wenyu River Catchment and could be applied to other basins with large number of dams. Its application to the Wenyu River Catchment has a great significance for the sustainable economic development of Beijing City.

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Comparison of two different approaches of sensitivity analysis

Cited by 479 publications

References 7 publications

Improvement of SWAT2000 modelling to assess the impact of dams and sluices on streamflow in the Huai River basin of China

Improvement of SWAT2000 modelling to assess the impact of dams and sluices on streamflow in the Huai River basin of China

Impact of Infiltration Process Modeling on Soil Water Content Simulations for Irrigation Management

Water quantity and quality optimization modeling of dams operation based on SWAT in Wenyu River Catchment, China

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