Modeling soil water regime under varying climatic, soil profile, and vegetation conditions

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modeling soil water regime under varying climatic, soil profile, and vegetation conditions

Popis výsledku v původním jazyce

Understanding the soil water regime response to unusual weather events is an essential base for evaluating the potential impact of the foreseen climate changes. Mountainous headwater catchments provide a unique opportunity for studying soil water regime. They are highly sensitive to climate stress, play a major role in initial stages of large-scale flood events, and often suffer from flash floods.nThe study is based on data collected at two experimental catchments, both located in the Bohemian Forest, southern Bohemia. The catchments differ in climatic and soil conditions, as well as in vegetation cover. The Liz catchment (0.99 km2, 941 m a. s. l.) has milder climate (average temperature 6.3°C, average annual precipitation 861 mm). The soil is the oligotrophic Eutric Cambisol developed upon biotite paragneiss bedrock. The catchment is covered by spruce and beech forest. The majority of trees are 97 years old. Within the catchment, soil water regime is monitored at three sites with different vegetation (spruce tree stand, beech tree stand, mountain meadow). The Roklan catchment represents higher locations of the mountain range (0.10 km2, 1244 m a. s. l., 4.1°C, 1725 mm). The soil type is Cryptopodzol. The region was affected by forest die-off caused by bark beetle in the late 1990s. Presently, the catchment is covered by dead trees, sparse natural regrowth dominated by spruce, and herb undergrowth.nWater regime at the experimental sites is simulated using a one-dimensional dual-continuum model of soil water flow, S1D. The model allows treating the soil profile as two semi-separate flow domains representing the soil matrix and the network of preferential pathways. Plant water uptake is described based on potential gradient approach. Daily variation of plant water storage is also accounted for. Comparison of observed variables and model outputs for different sites and contrasting vegetation seasons serves to improve understanding and model representation of the studied headwater catchments’ hydrologic function.

Název v anglickém jazyce

Modeling soil water regime under varying climatic, soil profile, and vegetation conditions

Popis výsledku anglicky

Understanding the soil water regime response to unusual weather events is an essential base for evaluating the potential impact of the foreseen climate changes. Mountainous headwater catchments provide a unique opportunity for studying soil water regime. They are highly sensitive to climate stress, play a major role in initial stages of large-scale flood events, and often suffer from flash floods.nThe study is based on data collected at two experimental catchments, both located in the Bohemian Forest, southern Bohemia. The catchments differ in climatic and soil conditions, as well as in vegetation cover. The Liz catchment (0.99 km2, 941 m a. s. l.) has milder climate (average temperature 6.3°C, average annual precipitation 861 mm). The soil is the oligotrophic Eutric Cambisol developed upon biotite paragneiss bedrock. The catchment is covered by spruce and beech forest. The majority of trees are 97 years old. Within the catchment, soil water regime is monitored at three sites with different vegetation (spruce tree stand, beech tree stand, mountain meadow). The Roklan catchment represents higher locations of the mountain range (0.10 km2, 1244 m a. s. l., 4.1°C, 1725 mm). The soil type is Cryptopodzol. The region was affected by forest die-off caused by bark beetle in the late 1990s. Presently, the catchment is covered by dead trees, sparse natural regrowth dominated by spruce, and herb undergrowth.nWater regime at the experimental sites is simulated using a one-dimensional dual-continuum model of soil water flow, S1D. The model allows treating the soil profile as two semi-separate flow domains representing the soil matrix and the network of preferential pathways. Plant water uptake is described based on potential gradient approach. Daily variation of plant water storage is also accounted for. Comparison of observed variables and model outputs for different sites and contrasting vegetation seasons serves to improve understanding and model representation of the studied headwater catchments’ hydrologic function.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10501 - Hydrology

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů