keyword
MENU ▼
Read by QxMD icon Read
search

Evapotranspiration

keyword
https://www.readbyqxmd.com/read/28526833/grassland-restoration-reduces-water-yield-in-the-headstream-region-of-yangtze-river
#1
Jia Li, Dan Liu, Tao Wang, Yingnian Li, Shiping Wang, Yuting Yang, Xiaoyi Wang, Hui Guo, Shushi Peng, Jinzhi Ding, Miaogen Shen, Lei Wang
Large-scale ecological restoration programs are considered as one of the key strategies to enhance ecosystem services. The Headstream region of Yangtze River (HYZR), which is claimed to be China's Water Tower but witnessed the rapid grassland deterioration during 1970s-2000, has seen a series of grassland restoration programs since 2000. But few studies have thoroughly estimated the hydrological effect of this recent grassland restoration. Here we show that restoration significantly reduces growing-season water yield coefficient (WYC) from 0...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28515537/estimating-spatially-distributed-turbulent-heat-fluxes-from-high-resolution-thermal-imagery-acquired-with-a-uav-system
#2
Claire Brenner, Christina Elisabeth Thiem, Hans-Dieter Wizemann, Matthias Bernhardt, Karsten Schulz
In this study, high-resolution thermal imagery acquired with a small unmanned aerial vehicle (UAV) is used to map evapotranspiration (ET) at a grassland site in Luxembourg. The land surface temperature (LST) information from the thermal imagery is the key input to a one-source and two-source energy balance model. While the one-source model treats the surface as a single uniform layer, the two-source model partitions the surface temperature and fluxes into soil and vegetation components. It thus explicitly accounts for the different contributions of both components to surface temperature as well as turbulent flux exchange with the atmosphere...
May 19, 2017: International Journal of Remote Sensing
https://www.readbyqxmd.com/read/28511357/establishing-and-testing-a-catchment-water-footprint-framework-to-inform-sustainable-irrigation-water-use-for-an-aquifer-under-stress
#3
Betsie le Roux, Michael van der Laan, Teunis Vahrmeijer, Keith L Bristow, John G Annandale
Future water scarcities in the face of an increasing population, climate change and the unsustainable use of aquifers will present major challenges to global food production. The ability of water footprints (WFs) to inform water resource management at catchment-scale was investigated on the Steenkoppies Aquifer, South Africa. Yields based on cropping areas were multiplied with season-specific WFs for each crop to determine blue and green water consumption by agriculture. Precipitation and evapotranspiration of natural vegetation and other uses of blue water were included with the agricultural WFs to compare water availability and consumption in a catchment sustainability assessment...
May 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28501013/comparison-of-surface-energy-budgets-and-feedbacks-to-microclimate-among-different-land-use-types-in-an-agro-pastoral-ecotone-of-northern-china
#4
Wei Zhao, Zhongmin Hu, Shenggong Li, Qun Guo, Zhengjia Liu, Leiming Zhang
The biophysical effect of land use conversion plays a significant role in regulating climate change. Owing to albedo and evapotranspiration (ET) change, the effect of energy budget difference on land surface temperature (LST) is important but unclear among contrasting land use types, especially in temperate semi-arid regions. Based on moderate-resolution imaging spectroradiometer (MODIS) data, we compared the differences in albedo, ET, and LST between cropland and grassland (CR-GR), and between planted forest and grassland (PF-GR) in the Horqin Sandy Land of Inner Mongolia, an agro-pastoral ecotone of northern China...
May 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28494284/evaluating-the-impact-of-irrigation-on-surface-water-groundwater-interaction-and-stream-temperature-in-an-agricultural-watershed
#5
Hedeff I Essaid, Rodney R Caldwell
Changes in groundwater discharge to streams caused by irrigation practices can influence stream temperature. Observations along two currently flood-irrigated reaches in the 640-square-kilometer upper Smith River watershed, an important agricultural and recreational fishing area in west-central Montana, showed a downstream temperature decrease resulting from groundwater discharge to the stream. A watershed-scale coupled surface water and groundwater flow model was used to examine changes in streamflow, groundwater discharge to the stream and stream temperature resulting from irrigation practices...
May 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28493142/sampling-strategy-and-climatic-implication-of-tree-ring-cellulose-oxygen-isotopes-of-hippophae-tibetana-and-abies-georgei-on-the-southeastern-tibetan-plateau
#6
Chenxi Xu, Haifeng Zhu, Takeshi Nakatsuka, Masaki Sano, Zhen Li, Feng Shi, Eryuan Liang, Zhengtang Guo
The tree-ring cellulose oxygen isotopes (δ(18)O) for four trees of Hippophae tibetana and four trees of Abies georgei growing in different locations around the terminal moraine in Xincuo from 1951 to 2010 were measured to explore its potential for reconstructing climatic variations in the southeastern Tibetan Plateau. The mean and standard deviation of tree-ring δ(18)O at different heights do not have significant differences, and there are no significant differences in the mean and standard deviation of tree-ring δ(18)O between trees near the brook and trees at the top of moraine, indicating that we can collect samples for tree-ring δ(18)O analysis regardless of sampling heights and that the micro-environment does not affect tree-ring δ(18)O significantly...
May 10, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28488391/essential-oil-variability-in-natural-populations-of-artemisia-campestris-l-and-artemisia-herba-alba-asso-and-incidence-on-antiacetylcholinesterase-and-antioxidant-activities
#7
Faten Younsi, Sameh Mehdi, Oumayma Aissi, Najoua Rahali, Rym Jaouadi, Mohamed Boussaid, Chokri Messaoud
The intraspecific variability of A. herba-alba and A. campestris essential oils and the evaluation of their antioxidant and antiacetylcholinesterase activities were determined. A. herba-alba essential oil was found rich in camphor (19.61%), α-thujone (19.40%), β-thujone (9.44%), chrysanthenone (9.26%) and trans-sabinyl acetate (8.43%). The major compounds of A. campestris essential oil were germacrene D (16.38%), β-pinene (16.33%) and limonene (9.17%). Significant variation in the essential oil composition was observed among populations of each species...
May 10, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28486483/insight-into-runoff-characteristics-using-hydrological-modeling-in-the-data-scarce-southern-tibetan-plateau-past-present-and-future
#8
Mingyong Cai, Shengtian Yang, Changsen Zhao, Qiuwen Zhou, Lipeng Hou
Regional hydrological modeling in ungauged regions has attracted growing attention in water resources research. The southern Tibetan Plateau often suffers from data scarcity in watershed hydrological simulation and water resources assessment. This hinders further research characterizing the water cycle and solving international water resource issues in the area. In this study, a multi-spatial data based Distributed Time-Variant Gain Model (MS-DTVGM) is applied to the Yarlung Zangbo River basin, an important international river basin in the southern Tibetan Plateau with limited meteorological data...
2017: PloS One
https://www.readbyqxmd.com/read/28480000/coexistence-trend-contingent-to-mediterranean-oaks-with-different-leaf-habits
#9
Arianna Di Paola, Alain Paquette, Antonio Trabucco, Simone Mereu, Riccardo Valentini, Francesco Paparella
In a previous work we developed a mathematical model to explain the co-occurrence of evergreen and deciduous oak groups in the Mediterranean region, regarded as one of the distinctive features of Mediterranean biodiversity. The mathematical analysis showed that a stabilizing mechanism resulting from niche difference (i.e. different water use and water stress tolerance) between groups allows their coexistence at intermediate values of suitable soil water content. A simple formal derivation of the model expresses this hypothesis in a testable form linked uniquely to the actual evapotranspiration of forests community...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28477249/research-development-current-hotspots-and-future-directions-of-water-research-based-on-modis-images-a-critical-review-with-a-bibliometric-analysis
#10
Yibo Zhang, Yunlin Zhang, Kun Shi, Xiaolong Yao
Water is essential for life as it provides drinking water and food for humans and animals. Additionally, the water environment provides habitats for numerous species and plays an important role in hydrological, nutrient, and carbon cycles. Among the existing natural resources on Earth's surface, water is the most extensive as it covers more than 70% of the Earth. To gather a comprehensive understanding of the focus of past, present, and future directions of remote sensing water research, we provide an alternative perspective on water research using moderate resolution imaging spectroradiometer (MODIS) imagery by conducting a comparative quantitative and qualitative analysis of research development, current hotspots, and future directions using a bibliometric analysis...
May 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28474209/climatic-induced-shifts-in-the-distribution-of-teak-tectona-grandis-in-tropical-asia-implications-for-forest-management-and-planning
#11
Jiban Chandra Deb, Stuart Phinn, Nathalie Butt, Clive A McAlpine
Modelling the future suitable climate space for tree species has become a widely used tool for forest management planning under global climate change. Teak (Tectona grandis) is one of the most valuable tropical hardwood species in the international timber market, and natural teak forests are distributed from India through Myanmar, Laos and Thailand. The extents of teak forests are shrinking due to deforestation and the local impacts of global climate change. However, the direct impacts of climate changes on the continental-scale distributions of native and non-native teak have not been examined...
May 4, 2017: Environmental Management
https://www.readbyqxmd.com/read/28465559/multivariate-assessment-and-attribution-of-droughts-in-central-asia
#12
Zhi Li, Yaning Chen, Gonghuan Fang, Yupeng Li
While the method for estimating the Palmer Drought Severity Index (PDSI) is now more closely aligned to key water balance components, a comprehensive assessment for measuring long-term droughts that recognizes meteorological, agro-ecological and hydrological perspectives and their attributions is still lacking. Based on physical approaches linked to potential evapotranspiration (PET), the PDSI in 1965-2014 showed a mixture of drying (42% of the land area) and wetting (58% of the land area) that combined to give a slightly wetting trend (0...
May 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28464444/shifting-pacific-storm-tracks-as-stressors-to-ecosystems-of-western-north-america
#13
Matthew P Dannenberg, Erika K Wise
Much of the precipitation delivered to western North America arrives during the cool season via midlatitude Pacific storm tracks, which may experience future shifts in response to climate change. Here, we assess the sensitivity of the hydroclimate and ecosystems of western North America to the latitudinal position of cool-season Pacific storm tracks. We calculated correlations between storm track variability and three hydroclimatic variables: gridded cool-season standardized precipitation-evapotranspiration index, April snow water equivalent, and water year streamflow from a network of USGS stream gauges...
May 2, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28463774/are-the-traditional-large-scale-drought-indices-suitable-for-shallow-water-wetlands-an-example-in-the-everglades
#14
Dehua Zhao, Penghe Wang, Jie Zuo, Hui Zhang, Shuqing An, Reddy K Ramesh
Numerous drought indices have been developed over the past several decades. However, few studies have focused on the suitability of indices for studies of ephemeral wetlands. The objective is to answer the following question: can the traditional large-scale drought indices characterize drought severity in shallow water wetlands such as the Everglades? The question was approached from two perspectives: the available water quantity and the response of wetland ecosystems to drought. The results showed the unsuitability of traditional large-scale drought indices for characterizing the actual available water quantity based on two findings...
April 29, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28463483/a-field-trial-of-tce-phytoremediation-by-genetically-modified-poplars-expressing-cytochrome-p450-2e1
#15
Emily K Legault, C Andrew James, Keith Stewart, Indulis Muiznieks, Sharon L Doty, Stuart E Strand
A controlled field study was performed to evaluate the effectiveness of transgenic poplars for phytoremediation in a field setting. Three hydraulically contained test beds were planted with twelve transgenic poplars, twelve wild type (WT) poplars, or left unplanted, and dosed with equivalent amounts of trichloroethylene (TCE). Degradation of TCE was enhanced in the transgenic tree bed, but not to the extent of the enhanced removal observed in laboratory studies. Total chlorinated ethene removal was 87% in the CYP2E1 bed, 85% in the WT bed, and 34% in the unplanted bed in 2012...
May 2, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28448927/time-varying-sensitivity-analysis-of-hydrologic-and-sediment-parameters-at-multiple-timescales-implications-for-conservation-practices
#16
Hui Xie, Zhenyao Shen, Lei Chen, Jiali Qiu, Jianwei Dong
Environmental models can be used to better understand the hydrologic and sediment behavior in a watershed system. However, different processes may dominate at different time periods and timescales, which highly complicate the model interpretation. The related parameter uncertainty may be significant and needs to be addressed to avoid bias in the watershed management. In this study, we used the time-varying and multi-timescale (TVMT) method to characterize the temporal dynamics of parameter sensitivity at different timescales in hydrologic and sediment modeling...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28433768/response-of-evapotranspiration-to-changes-in-land-use-and-land-cover-and-climate-in-china-during-2001-2013
#17
Gen Li, Fangmin Zhang, Yuanshu Jing, Yibo Liu, Ge Sun
Land surface evapotranspiration (ET) is a central component of the Earth's global energy balance and water cycle. Understanding ET is important in quantifying the impacts of human influences on the hydrological cycle and thus helps improving water use efficiency and strengthening water use planning and watershed management. China has experienced tremendous land use and land cover changes (LUCC) as a result of urbanization and ecological restoration under a broad background of climate change. This study used MODIS data products to analyze how LUCC and climate change affected ET in China in the period 2001-2013...
April 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28431371/past-present-and-future-land-use-changes-and-their-impact-on-water-balance
#18
Sananda Kundu, Deepak Khare, Arun Mondal
Landuse change influences the water balance of a region affecting the available water along with the change in the evapotranspiration (ET). The major objectives of this study are to assess the landuse change and its impact on the water balance of the study area, which is a part of the Narmada river basin in Madhya Pradesh, India. Landuse changes of 1990, 2000 and 2011 have been analyzed and the Markov Chain model has been used to predict decadal change of 2020, 2030, 2040 and 2050 landuse. The influence of the past, present and future landuse change on water balance has been analyzed with the SWAT (Soil and Water Analysis Tool) model in the study area...
April 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28421270/climate-variability-impacts-on-rainfed-cereal-yields-in-west-and-northwest-iran
#19
Milad Nouri, Mehdi Homaee, Mohammad Bannayan
In order to assess the response of wheat and barley to climate variability, the correlation between variations of yields with local and global climate variables was investigated in west and northwest Iran over 1982-2013. The global climate variables were the El Niño-Southern Oscillation (ENSO), Arctic Oscillation (AO), and North Atlantic Oscillation (NAO) signals. Further, minimum (T min), maximum (T max), and mean (T mean) temperature, diurnal temperature range (DTR), precipitation, and reference evapotranspiration (ET0) was used as local weather factors...
April 18, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28418005/simulated-climate-effects-of-desert-irrigation-geoengineering
#20
Wei Cheng, John C Moore, Long Cao, Duoying Ji, Liyun Zhao
Geoengineering, the deliberate large-scale manipulation of earth's energy balance to counteract global warming, is an attractive proposition for sparsely populated deserts. We use the BNU and UVic Earth system models to simulate the effects of irrigating deserts under the RCP8.5 scenario. Previous studies focused on increasing desert albedo to reduce global warming; in contrast we examine how extending afforestation and ecological projects, that successfully improve regional environments, fair for geoengineering purposes...
April 18, 2017: Scientific Reports
keyword
keyword
52556
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"