Article
Agronomy
Z. Ntshidi, S. Dzikiti, D. Mazvimavi, N. T. Mobe
Summary: Orchard evapotranspiration (ET) is a complex process that includes tree transpiration, understorey vegetation transpiration, soil evaporation, and mulches. The study found that in young orchards, orchard floor evaporative fluxes accounted for over 80% of the measured ET, while in mature orchards, these losses were less significant.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Mechanics
Wenhan Zheng, Fangjun Hong, Shuai Gong
Summary: In this paper, the thermal pseudo-potential lattice Boltzmann method (LBM) is improved by introducing multi-relaxation time operators and deriving dimensionless evolution equations. The accuracy and efficiency of the method are further enhanced by improving the energy equation, adopting a more accurate equation of state, and modifying the surface tension coefficient. Moreover, a three-layer boundary structure is proposed to incorporate the intermolecular force and internal heat source term. These improvements enable efficient and accurate simulation of liquid-vapor phase transition.
Article
Agronomy
Shanshan Qin, Yanqun Zhang, Jiandong Wang, Yan Mo, Shihong Gong, Shuji Wang
Summary: This study investigated the effects of straw mulching on evapotranspiration and related factors in a drip-irrigated maize field. The results showed that straw mulching slightly reduced evapotranspiration, increased crop coefficients and canopy conductance, and decreased soil evaporation.
ARCHIVES OF AGRONOMY AND SOIL SCIENCE
(2023)
Article
Agronomy
Lining Song, Jiaojun Zhu, Ting Zhang, Kai Wang, Guochen Wang, Jianhua Liu
Summary: The study revealed that solar radiation had a greater impact on canopy transpiration in poplar plantations than vapor pressure deficit (VPD). The total canopy transpiration in dry years was higher in poplar plantations, which might lead to tree mortality.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Agronomy
Ruiqi Ren, Han Fu, Bingcheng Si, Nicholas J. Kinar, Kathy Steppe
Summary: Probe spacing affects sap flow measurement in plants. Most non-destructive methods rely on the assumption of nocturnal zero flow conditions, which is often invalid in natural biological systems. This study presents a novel method for accurate in situ determination of probe spacing, using mathematical models and nonlinear curve fitting during low flow conditions. The proposed method allows real time probe spacing measurements, reducing uncertainties associated with zero flow assumption.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Agronomy
Jinlin Lyu, Qiu-Yue He, Qiu-Wen Chen, Ran-Ran Cheng, Guoqing Li, Kyoichi Otsuki, Norikazu Yamanaka, Sheng Du
Summary: This study quantified the changes in transpiration of black locust trees in different climatic regions of the Loess Plateau in China. The results showed that the black locust species has the ability to adapt to different climatic conditions and enhance its water use efficiency by reducing transpiration and modifying leaf morphology.
AGRICULTURAL WATER MANAGEMENT
(2022)
Article
Water Resources
Bram Hadiwijaya, Pierre-Erik Isabelle, Daniel F. Nadeau, Steeve Pepin
Summary: This study focused on observing and estimating canopy storage capacity and wet canopy evaporation in a humid boreal forest in Quebec, Canada. The research found that the amount of water intercepted by the forest canopy during rainfall accounted for 11% of the total rainfall, with evaporation of intercepted water representing 21% of evapotranspiration.
HYDROLOGICAL PROCESSES
(2021)
Article
Agronomy
Michael A. Forster, Tony D. H. Kim, Sylvie Kunz, Majed Abuseif, Vishal R. Chulliparambil, Jannany Srichandra, Ruby N. Michael
Summary: Transpiration is a fundamental biophysical process, but the accuracy of the E-2.88 model in predicting apple and pear transpiration is influenced by phenology.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Engineering, Civil
Zelong Yang, Peng Bai
Summary: This study evaluated six commonly used models for estimating evaporation from snow surfaces (ESS) at twelve high-latitude and high-altitude CO2 flux observation sites. The Penman model showed the best performance on both the hourly and daily scales, with KGE coefficients of 0.75 and 0.65, respectively. In the absence of net radiation data, the empirical model is recommended.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Limor Shashua-Bar, Mohammad A. Rahman, Astrid Moser-Reischl, Aviva Peeters, Eleonora Franceschi, Hans Pretzsch, Thomas Ro, Stephan Pauleit, Elli Groner, Gidon Winters, Shabtai Cohen
Summary: This study investigated the evaporative cooling effect of urban trees through transpiration in two contrasting climates. Experimental measurements of transpiration were conducted on local tree species in Munich, Germany (temperate climate) and Beer Sheva, Israel (hot arid climate), considering various environmental settings and surface conditions. The comparison revealed that hydraulic resistance, determined by the slope of the linear relationship between midday canopy resistance and vapor pressure deficit (VPD), was higher in Beer Sheva due to larger crown projected area (CPA). The contribution of transpirational cooling was found to be about 40% less significant in Beer Sheva compared to Munich. Shading was identified as the main factor to consider when planting local trees in hot dry climates. The linear relationship between midday canopy resistance and VPD can serve as an operative tool for evaluating evaporative cooling of local trees in different climatic regions.
Article
Forestry
Xinsheng Liu, Franco Biondi
Summary: The sap flow of quaking aspen, Engelmann spruce, and limber pine showed species-specific responses to declining soil moisture, indicating different water use strategies. Conifers like spruce and pine may tap into deeper soil water reservoirs under drought conditions, while deciduous species like aspen may face hydraulic failure and mortality risks. The study highlighted contrasting hydrological niches and physiological strategies between co-occurring tree species in semiarid, high-elevation ecosystems.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Forestry
Lei Ouyang, Ping Zhao, Xingquan Rao, Liwei Zhu, Guangyan Ni
Summary: This study investigated the tree transpiration, canopy stomatal conductance, and stomatal sensitivity to vapor pressure deficit of four typical plantation tree species in hilly lands of South China. The results showed different water use and stomatal behavior among the species, with broadleaved species generally possessing higher leaf area, specific leaf area, and deeper root depth. The study provides insights into the response of stomatal conductance to changing environment for typical species in subtropical moist forests, which is important for forest management and ecosystem stability under future climate changes.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Forestry
Mehmet S. Ozcelik, Ivana Tomaskova, Peter Surovy, Roman Modlinger
Summary: This study investigated the effect of forest-edge cutting on the transpiration rates of Picea abies trees and their susceptibility to bark-beetle Ips typographus infestation. The results showed that forest-edge clearance caused an increase in sap flow of the trees and was positively correlated with decreased canopy density.
Article
Engineering, Civil
Palingamoorthy Gnanamoorthy, Qinghai Song, Junbin Zhao, Yiping Zhang, Jing Zhang, Youxing Lin, Liguo Zhou, Sadia Bibi, Chenna Sun, Hui Yu, Wenjun Zhou, Liqing Sha, Shusen Wang, S. Chakraborty, Pramit Kumar Deb Burman
Summary: The effect of fog on plant physiological parameters in a mature rubber plantation in southwest China was studied over 3 years. The results showed that foggy days during the cool dry season reduced the physiological activities of rubber trees, but enhanced crop water productivity. This suggests that fog events can reduce water demand and alleviate water stress for trees by regulating plant physiology.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Pushpendra Raghav, Pradeep Wagle, Mukesh Kumar, Tirtha Banerjee, James P. S. Neel
Summary: The effectiveness of using vegetation index to obtain spatially resolved plant transpiration to evapotranspiration ratio in wheat systems with different management practices was evaluated in this study. The results showed a weak relationship between vegetation index and transpiration to evapotranspiration ratio in disturbed systems. Using flux partitioning based on the relationship between vegetation index and transpiration to evapotranspiration ratio derived in undisturbed wheat systems introduced large errors in disturbed systems.
WATER RESOURCES RESEARCH
(2022)
