An integral-balance nonlinear model to simulate changes in soil moisture, groundwater and surface runoff dynamics at the hillslope scale

Curtu, Rodica; Mantilla, Ricardo; Fonley, Morgan; Cunha, L.; Small, Scott J.; Jay, Laurent O.; Krajewski, Witold F.

doi:10.1016/j.advwatres.2014.06.003

Cited by 17 publications

(18 citation statements)

References 21 publications

(43 reference statements)

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“…Constitutive relationships in the form of retention and hydraulic conductivity functions need to be specified in each element of the model and these requirements can not easily be honored from field measurements. The parameters of physically based models are intended to be measurable in the field or derivable from field measurements (Curtu et al, 2014), which raise several concerns both from theoretical and scaling arguments. Richards' equation for unsaturated flow is originally developed for small-scale homogeneous systems and even though it has been widely used at larger scale to represent flow in natural heterogeneous systems.…”

Section: Introductionmentioning

confidence: 99%

Effect of Unsaturated Flow Model Conceptualization on the Dynamic Response of an Integrated Distributed Hydrological Model

Lu¹

2017

Appl Ecol Env Res

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Abstract. Water dynamics in the unsaturated zone is one of the most important processes as it controls model precision. One of the limitations in using a catchment model based on a Richards' equation is the huge amount of parameters required to run the model. In this study, we investigate the effect of unsaturated flow conceptualization models on the dynamic response of an integrated distributed hydrological model, which are (1) Richards equation (simple parameterization RI2) (2) Two layer water balance model (TLM). The physically based distributed modelling system, MIKESHE is applied to the Skjern catchment with the objective to test and analyze the effect of using different models for unsaturated flow on the dynamic response of an integrated distributed hydrological model. Results from this study show that regarding peak discharge at the catchment outlet follows the TLM, RI2 sequence. Similar results were found for the discharge characteristics of the sub basin. The close agreement between the simulated results of the two models also indicates that the simple TLM model is more suitable than the complex Richard equation model at least for the condition of the Skjern catchment, while its weaknesses is not describing the groundwater dynamics well.

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Section: Introductionmentioning

confidence: 99%

Effect of Unsaturated Flow Model Conceptualization on the Dynamic Response of an Integrated Distributed Hydrological Model

Lu¹

2017

Appl Ecol Env Res

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“…In Chapter 2 we will instead begin with the soil model described in [9]. This model has the benefits of being physically-based while still giving good approximations for both streamflow and water in the soil storage.…”

Section: The Addition Of Pdes To Represent Some Processesmentioning

confidence: 99%

“…Although the relationship between antecedent soil moisture and runoff coefficient is well established, the behavior of soil moisture in response to precipitation pattern is less so. We aim to apply an oscillatory precipitation pattern to the model developed in [9] to determine the precipitation pattern that maximizes the runoff coefficient, which primes the hillslope for flooding conditions. This topic is covered in Chapter 2 of the thesis.…”

Section: Extreme Hydrologic Scenarios: Flooding and Low Flowmentioning

confidence: 99%

“…In this Chapter we address the above question in the context of a rainfall-runoff model recently proposed in [9]. There are several advantages to this approach.…”

Section: Introductionmentioning

confidence: 99%

“…There are several advantages to this approach. First, the model in [9] is an integral-balance nonlinear system that describes the simultaneous dynamics of the soil moisture, ground-water, and surface runoff at a hillslope scale. Second, it has been already compared with hydrological data, and it was shown to provide both good qualitative and quantitative approximations of the latter (e.g., soil and flow data from Once it has settled to equilibrium, the system is then subjected to an oscillatory precipitation pattern.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of oscillatory forcing on hydrologic systems under extreme conditions

Fonley¹

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A low-dimensional subsurface model for saturated and unsaturated flow processes: ability to address heterogeneity

et al. 2017

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An integral-balance nonlinear model to simulate changes in soil moisture, groundwater and surface runoff dynamics at the hillslope scale

Cited by 17 publications

References 21 publications

Effect of Unsaturated Flow Model Conceptualization on the Dynamic Response of an Integrated Distributed Hydrological Model

Effect of Unsaturated Flow Model Conceptualization on the Dynamic Response of an Integrated Distributed Hydrological Model

Effects of oscillatory forcing on hydrologic systems under extreme conditions

A low-dimensional subsurface model for saturated and unsaturated flow processes: ability to address heterogeneity

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