Effect of surface and subsurface heterogeneity on the hydrological response of a grassed buffer zone

Gatel, Laura; Lauvernet, Claire; Carluer, Nadia; Paniconi, Claudio

doi:10.1016/j.jhydrol.2016.09.038

Cited by 13 publications

(11 citation statements)

References 63 publications

(76 reference statements)

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“…Furthermore, the threshold value chosen should not be limited by the volumetric soil moisture content. While our research used the relative saturation index based on HOF theory, other parameters, such as hydraulic conductivity, might be more reasonable 41,42,50,51 . However, the methods mentioned above should be tested and verified in future research initiatives, which are beyond the scope of the current study.…”

Section: Discussionmentioning

confidence: 99%

Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale

Liu

Engel²,

Wang

et al. 2019

Sci Rep

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Structural hydrological connectivity has been proposed to describe the geological structure of the landscape as well as to explain hydrological behaviors. Indices based on the topological or soil condition were developed to interpret their relationships. While previous studies mainly focused on well-instrumented catchments which are narrow in humidity or temperate zone, the hydrological responses to structural connectivity at the plot and hill slope scale as well as in arid or semi-arid climate conditions remain unclear. This study was conducted in the semi-arid mountainous region of northern China in Haihe Basin which is the source of water of about 350 million people. Experiments were conducted during the rainy season in 2012 and 2013 using four runoff plots. Two indices, flow path length (FL) based on topography and integral connectivity scale length (ICSL) based on soil moisture conditions, developed to represent hydrological connectivity structure and the runoff response to rainfall were analyzed. The results showed that the surface runoff coefficient was strongly and positively linearly correlated to FL, and the correlation between subsurface flow and ICSLs was quadratic. Plots with shorter FL required more rainfall to generate surface runoff. In the shallow soil layer, when the ICSLs are relatively low, the soil can store more water and less rainfall feeds subsurface runoff. Further analysis indicated that improved shallow soil connectivity conditions might enhance the water-holding capacity and lead to lower water yields for each event. This study demonstrated that hydrological structure connectivity could explain the mechanism of runoff generation in semi-arid areas while further experiments should be undertaken to find the threshold-like relationship between FL and surface runoff as well as the influence of plant cover on hydrological behaviors.

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Section: Discussionmentioning

confidence: 99%

Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale

Liu

Engel²,

Wang

et al. 2019

Sci Rep

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“…TOPKAPI has been successfully implemented as a research and operational hydrologic model in several catchments worldwide (e.g., [52][53][54][55]). The CATHY model has been used in many exploratory studies, benchmarking exercises, and real catchment applications (e.g., [18,31,[56][57][58][59]).…”

Section: Hydrologic Modelsmentioning

confidence: 99%

Investigating Parameter Transferability across Models and Events for a Semiarid Mediterranean Catchment

Perra

Piras

Deidda

et al. 2019

Water

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Physically based distributed hydrologic models (DHMs) simulate watershed processes by applying physical equations with a variety of simplifying assumptions and discretization approaches. These equations depend on parameters that, in most cases, can be measured and, theoretically, transferred across different types of DHMs. The aim of this study is to test the potential of parameter transferability in a real catchment for two contrasting periods among three DHMs of varying complexity. The case study chosen is a small Mediterranean catchment where the TIN-based Real-time Integrated Basin Simulator (tRIBS) model was previously calibrated and tested. The same datasets and parameters are used here to apply two other DHMs—the TOPographic Kinematic Approximation and Integration model (TOPKAPI) and CATchment HYdrology (CATHY) models. Model performance was measured against observed discharge at the basin outlet for a one-year period (1930) corresponding to average wetness conditions for the region, and for a much drier two-year period (1931–1932). The three DHMs performed comparably for the 1930 period but showed more significant differences (the CATHY model in particular for the dry period. In order to improve the performance of CATHY for this latter period, an hypothesis of soil crusting was introduced, assigning a lower saturated hydraulic conductivity to the top soil layer. It is concluded that, while the physical basis for the three models allowed transfer of parameters in a broad sense, transferability can break down when simulation conditions are greatly altered.

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“…It should be noted that the boundary zone of surface and subsurface is a complex environmental system where the mass (including pollutant) transformation occurs actively because of the active exchange of surface water and groundwater (Gatel et al, 2016). This situation is especially signi cant in the plain river network area in China where the underground water tables are generally high at -1 to -3 m (Gu et al, 2011;…”

Section: Introductionmentioning

confidence: 99%

Key Technologies and Equipment for Contaminated Surface/Groundwater Environment in the Rural River Network Area of China: Integrated Remediation

Wang

Xue

et al. 2020

Preprint

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In eastern China, the rural river network area (RRNA) is an anthropic active area characterized by its rapid economic development and high gross national product. However, the water environmental pollution in these areas is increasingly severe, which has greatly hindered its sustainable development. Especially, the frequent interactions between surface/groundwater (SW-GW) have intensified the pollution migration and transformation in RRNA. Therefore, an integrated remediation in rural river network area project (IR-RRNA) has been launched, funded by the Ministry of Science and Technology of the People’s Republic of China, to realize the integrated remediation of SW/GW and soil in RRNA. The IR-RRNA (2019–2022) will apply the related interdisciplinary and methodological knowledge to elucidate the transportation and transformation of pollutants in water and soil during SW-GW interaction, and develop key remediation technologies of surface water, groundwater, and soil suitable for the RRNA. By this way, we attempt to realize the remediation technologies integration for surface/groundwater and soil in RRNA and implementing application demonstration. Meanwhile, a technical guideline will be compiled for the integrated remediation suitable for the RRNA. This project is conducive to addressing the urgent environmental problems of RRNA, and promoting the rural economic revitalization and ecological environment optimization.

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Effect of surface and subsurface heterogeneity on the hydrological response of a grassed buffer zone

Cited by 13 publications

References 63 publications

Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale

Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale

Investigating Parameter Transferability across Models and Events for a Semiarid Mediterranean Catchment

Key Technologies and Equipment for Contaminated Surface/Groundwater Environment in the Rural River Network Area of China: Integrated Remediation

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