scholarly journals The effect of plant water storage on water fluxes within the coupled soil-plant system

2016 ◽  
Vol 213 (3) ◽  
pp. 1093-1106 ◽  
Author(s):  
Cheng-Wei Huang ◽  
Jean-Christophe Domec ◽  
Eric J. Ward ◽  
Tomer Duman ◽  
Gabriele Manoli ◽  
...  
Keyword(s):  
Water Storage ◽  
Plant Water ◽  
Water Fluxes ◽  
Plant System

A Hydrological Study of a Subtropical Semiarid Forest of Acacia harpophylla F. Muell. Ex Benth. (Brigalow)

1981 ◽  
Vol 29 (3) ◽  
pp. 311 ◽  
Author(s):  
BR Tunstall ◽  
DJ Connor
Keyword(s):  
Soil Water ◽  
Water Status ◽  
Water Storage ◽  
Soil Water Storage ◽  
Severe Drought ◽  
Plant Water ◽  
Evaporative Demand ◽  
Water Potentials ◽  
Plant Water Potential ◽  
Stem Flow

Water input, soil water storage and plant water status were measured at monthly intervals over 2� years In a mature brigalow (Acacla harpophylla) forest. Redistribution of rainfall by the canopy was slight and stem flow averaged only 1.8%, but the direct loss of intercepted water accounted for 15% of the Annual ramfall In the wettest condltlon the soil stored 890 mm of water to a depth of 3 m The minimum sod water store measured under severe drought conditions was 840 mm when the dawn values of plant water potential were -6.8 MPa The soil water potentials below 1 m were consistently around -3.5 MPa due largely to high salt concentrations The tendency in a drying soil was towards a uniform profile of soil water potentlal, and soil water at depths below 1 m was extracted only when dawn plant water potentials were less than - 3.5 MPa Over monthly Intervals the maximum and minimum rates of evapotransplratlon were 3.3 and 0 .46 mm/d respectively, and the pattern of community water use was related to rainfall and not to potentlal evaporation. To survive in such an environment the plants develop and withstand extremely low water potentials associated wlth the low availability of water and the high evaporative demand.

Coordination of stomatal control and stem water storage on plant water use in desert riparian trees

Trees ◽  
2019 ◽  
Vol 33 (3) ◽  
pp. 787-801 ◽  
Author(s):  
Tengfei Yu ◽  
Qi Feng ◽  
Jianhua Si ◽  
Elizabeth A. Pinkard
Keyword(s):  
Water Use ◽  
Water Storage ◽  
Plant Water ◽  
Stomatal Control ◽  
Riparian Trees ◽  
Plant Water Use ◽  
Stem Water ◽  
Stem Water Storage

Quantifying succulence: a rapid, physiologically meaningful metric of plant water storage

2012 ◽  
Vol 35 (9) ◽  
pp. 1533-1542 ◽  
Author(s):  
R. MATTHEW OGBURN ◽  
ERIKA J. EDWARDS
Keyword(s):  
Water Storage ◽  
Plant Water

scholarly journals Partitioning tree water usage into storage and transpiration in a mixed forest

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ziqiang Liu ◽  
Qianqian Liu ◽  
Zijun Wei ◽  
Xinxiao Yu ◽  
Guodong Jia ◽  
...  
Keyword(s):  
Rainy Season ◽  
Soil Layer ◽  
Mixed Forest ◽  
Water Storage ◽  
Experimental Period ◽  
Ratio Method ◽  
Water Fluxes ◽  
Water Usage ◽  
Platycladus Orientalis ◽  
Quercus Variabilis

Abstract Background Water migration and use are important processes in trees. However, it is possible to overestimate transpiration by equating the water absorbed through the plant roots to that diffused back to the atmosphere through stomatal transpiration. Therefore, it is necessary to quantify the water transpired and stored in plants. Method The δ2H/δ18O technique and heat ratio method were used to explore the water usage of coniferous and broad-leaved tree species, including the proportions of water used for transpiration and water storage. Results Platycladus orientalis and Quercus variabilis had strong plasticity in their water usage from different sources. Platycladus orientalis primarily used groundwater (30.5%) and the 60–100-cm soil layer (21.6%) throughout the experimental period and was sensitive to precipitation, absorbing water from the 0–20-cm layer (26.6%) during the rainy season. Quercus variabilis absorbed water from all sources (15.7%–36.5%) except from the 40–60-cm soil layer during the dry season. In addition, it did not change its water source but increased its groundwater uptake during the rainy season. The annual mean water fluxes of P. orientalis and Q. variabilis were 374.69 and 469.50 mm·year− 1, with 93.49% and 93.91% of the water used for transpiration, respectively. However, nocturnal sap flow in P. orientalis and Q. variabilis was mainly used for water storage in the trunk rather than transpiration, which effectively alleviated drought stress and facilitated the transport of nutrients. Conclusions The water stored in both species comprised 6%–7% of the total water fluxes and, therefore, should be considered in water balance models.

scholarly journals Reduction of vegetation-accessible water storage capacity after deforestation affects catchment travel time distributions and increases young water fractions in a headwater catchment

2021 ◽  
Vol 25 (9) ◽  
pp. 4887-4915
Author(s):  
Markus Hrachowitz ◽  
Michael Stockinger ◽  
Miriam Coenders-Gerrits ◽  
Ruud van der Ent ◽  
Heye Bogena ◽  
...  
Keyword(s):  
Travel Time ◽  
Hydrological Model ◽  
Storage Capacity ◽  
Water Storage ◽  
Model Parameters ◽  
Hydrological Response ◽  
Water Fluxes ◽  
Catchment Scale ◽  
Water Storage Capacity ◽  
Water Fractions

Abstract. Deforestation can considerably affect transpiration dynamics and magnitudes at the catchment scale and thereby alter the partitioning between drainage and evaporative water fluxes released from terrestrial hydrological systems. However, it has so far remained problematic to directly link reductions in transpiration to changes in the physical properties of the system and to quantify these changes in system properties at the catchment scale. As a consequence, it is difficult to quantify the effect of deforestation on parameters of catchment-scale hydrological models. This in turn leads to substantial uncertainties in predictions of the hydrological response after deforestation but also to a poor understanding of how deforestation affects principal descriptors of catchment-scale transport, such as travel time distributions and young water fractions. The objectives of this study in the Wüstebach experimental catchment are therefore to provide a mechanistic explanation of why changes in the partitioning of water fluxes can be observed after deforestation and how this further affects the storage and release dynamics of water. More specifically, we test the hypotheses that (1) post-deforestation changes in water storage dynamics and partitioning of water fluxes are largely a direct consequence of a reduction of the catchment-scale effective vegetation-accessible water storage capacity in the unsaturated root zone (SU, max) after deforestation and that (2) the deforestation-induced reduction of SU, max affects the shape of travel time distributions and results in shifts towards higher fractions of young water in the stream. Simultaneously modelling streamflow and stable water isotope dynamics using meaningfully adjusted model parameters both for the pre- and post-deforestation periods, respectively, a hydrological model with an integrated tracer routine based on the concept of storage-age selection functions is used to track fluxes through the system and to estimate the effects of deforestation on catchment travel time distributions and young water fractions Fyw. It was found that deforestation led to a significant increase in streamflow accompanied by corresponding reductions of evaporative fluxes. This is reflected by an increase in the runoff ratio from CR=0.55 to 0.68 in the post-deforestation period despite similar climatic conditions. This reduction of evaporative fluxes could be linked to a reduction of the catchment-scale water storage volume in the unsaturated soil (SU, max) that is within the reach of active roots and thus accessible for vegetation transpiration from ∼258 mm in the pre-deforestation period to ∼101 mm in the post-deforestation period. The hydrological model, reflecting the changes in the parameter SU, max, indicated that in the post-deforestation period stream water was characterized by slightly yet statistically not significantly higher mean fractions of young water (Fyw∼0.13) than in the pre-deforestation period (Fyw∼0.12). In spite of these limited effects on the overall Fyw, changes were found for wet periods, during which post-deforestation fractions of young water increased to values Fyw∼0.37 for individual storms. Deforestation also caused a significantly increased sensitivity of young water fractions to discharge under wet conditions from dFyw/dQ=0.25 to 0.36. Overall, this study provides quantitative evidence that deforestation resulted in changes in vegetation-accessible storage volumes SU, max and that these changes are not only responsible for changes in the partitioning between drainage and evaporation and thus the fundamental hydrological response characteristics of the Wüstebach catchment, but also for changes in catchment-scale tracer circulation dynamics. In particular for wet conditions, deforestation caused higher proportions of younger water to reach the stream, implying faster routing of stable isotopes and plausibly also solutes through the sub-surface.

scholarly journals Coupling of ecosystem-scale plant water storage and leaf phenology observed by satellite

2018 ◽  
Vol 2 (9) ◽  
pp. 1428-1435 ◽  
Author(s):  
Feng Tian ◽  
Jean-Pierre Wigneron ◽  
Philippe Ciais ◽  
Jérôme Chave ◽  
Jérôme Ogée ◽  
...  
Keyword(s):  
Water Storage ◽  
Leaf Phenology ◽  
Plant Water

A Simple Representation of Plant Water Storage Effects in Coupled Soil Water Flow and Transpiration Stream Modeling

2017 ◽  
Vol 16 (5) ◽  
pp. vzj2016.12.0128 ◽  
Author(s):  
Tomas Vogel ◽  
Jana Votrubova ◽  
Michal Dohnal ◽  
Jaromir Dusek
Keyword(s):  
Soil Water ◽  
Water Flow ◽  
Water Storage ◽  
Plant Water ◽  
Simple Representation ◽  
Transpiration Stream ◽  
Soil Water Flow ◽  
Storage Effects

scholarly journals Multiscale and Multivariate Evaluation of Water Fluxes and States over European River Basins

2015 ◽  
Vol 17 (1) ◽  
pp. 287-307 ◽  
Author(s):  
Oldrich Rakovec ◽  
Rohini Kumar ◽  
Juliane Mai ◽  
Matthias Cuntz ◽  
Stephan Thober ◽  
...  
Keyword(s):  
Parameter Estimation ◽  
Soil Moisture ◽  
Regional Scale ◽  
Water Storage ◽  
River Basins ◽  
Hydrologic Model ◽  
Grand Challenge ◽  
Water Fluxes ◽  
Total Water ◽  
Wide Range

Abstract Accurately predicting regional-scale water fluxes and states remains a challenging task in contemporary hydrology. Coping with this grand challenge requires, among other things, a model that makes reliable predictions across scales, locations, and variables other than those used for parameter estimation. In this study, the mesoscale hydrologic model (mHM) parameterized with the multiscale regionalization technique is comprehensively tested across 400 European river basins. The model fluxes and states, constrained using the observed streamflow, are evaluated against gridded evapotranspiration, soil moisture, and total water storage anomalies, as well as local-scale eddy covariance observations. This multiscale verification is carried out in a seamless manner at the native resolutions of available datasets, varying from 0.5 to 100 km. Results of cross-validation tests show that mHM is able to capture the streamflow dynamics adequately well across a wide range of climate and physiographical characteristics. The model yields generally better results (with lower spread of model statistics) in basins with higher rain gauge density. Model performance for other fluxes and states is strongly driven by the degree of seasonality that each variable exhibits, with the best match being observed for evapotranspiration, followed by total water storage anomaly, and the least for soil moisture. Results show that constraining the model against streamflow only may be necessary but not sufficient to warrant the model fidelity for other complementary variables. The study emphasizes the need to account for other complementary datasets besides streamflow during parameter estimation to improve model skill with respect to “hidden” variables.

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