Journal articles: 'Water status indicator'

1

Haddadin, Munther J. "Water characteristic curves and water status indicator." Water International 33, no. 4 (December 5, 2008): 406–14. http://dx.doi.org/10.1080/02508060802542099.

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Choné, X. "Stem Water Potential is a Sensitive Indicator of Grapevine Water Status." Annals of Botany 87, no. 4 (April 2001): 477–83. http://dx.doi.org/10.1006/anbo.2000.1361.

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King, B. A., R. W. Wall, and J. P. Taberna Jr. "Visual soil water status indicator for improved irrigation management." Computers and Electronics in Agriculture 32, no. 1 (July 2001): 31–43. http://dx.doi.org/10.1016/s0168-1699(01)00152-1.

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Derevenskaya, Olga Yurjevna, Evgenia Sergeevna Prytkova, and Elena Nikolaevna Unkovskaya. "Zooplankton as Water Quality Indicator in Shallow Lakes." Journal of Computational and Theoretical Nanoscience 16, no. 11 (November 1, 2019): 4486–90. http://dx.doi.org/10.1166/jctn.2019.8341.

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Long-term studies (1998–2018) of shallow lakes Krugloe and Krutoe (Russia) were carried out. The trophic status of the lakes was estimated using physicochemical parameters of water and the indicators of zooplankton. Physicochemical studies of Krugloe and Krutoe lake water make it possible to classify these reservoirs as eutrophic according to their trophic status. The lakes are characterized by low water transparency, a high content of organic substances in water, the “blooming” of water is observed periodically, accompanied by the increase of pH to 8–9 units. The zooplankton communities of Krugloe and Krutoe lakes are characterized by relatively low species richness, the dominance of a small number of species, and the predominance of species that are indicators of eutrophic waters. Quantitative indicators of zooplankton are characterized by significant fluctuations in values over the years, the prevalence of rotifers. They showed that zooplankton community is a good indicator of the trophic state of lakes. Such indicators of zooplankton communities as the composition of dominant species, their number, the presence of indicator species, the quantitative indicators of zooplankton and individual taxonomic groups, and the average individual mass of the zooplankton can be used to characterize the trophic status of lakes. They can be recommended for use during monitoring of the lake condition in the Volga-Kama State Natural Biosphere Reserve.

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Nadezhdina, N. "Sap flow index as an indicator of plant water status." Tree Physiology 19, no. 13 (November 1, 1999): 885–91. http://dx.doi.org/10.1093/treephys/19.13.885.

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Nadezhdina, N. "Sap flow index as an indicator of plant water status." Tree Physiology 19, no. 14 (December 1, 1999): 960. http://dx.doi.org/10.1093/treephys/19.14.960.

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Gómez-Giráldez, Pedro J. "Integración de imágenes de sensores remotos en el desarrollo de indicadores medioambientales en cuencas mediterráneas. Aplicación al seguimiento de su estado hídrico y productividad." Revista de Teledetección, no. 58 (July 21, 2021): 147. http://dx.doi.org/10.4995/raet.2021.14986.

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This thesis proposes the use of remote sensing images of different spatial, spectral and temporal resolutions that, combined with meteorological, hydrological and phenological data, can be used to produce indicators of different ecosystem variables related to productivity and water status in different unique systems of the Mediterranean region. Specifically, the development of three indicators closely linked to each other is proposed: an indicator of the water status of the soil at the end of the dry season from the state of different vegetation covers; an indicator of the productivity of natural pastures, the main food support for extensive livestock in dehesa ecosystems, based on their status and the climatic conditions of the period evaluated; and, finally, an indicator of the relationship between water state of the soil and the natural pasture phenological state.

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Česonienė, Laima, Daiva Šileikienė, and Midona Dapkienė. "Relationship between the Water Quality Elements of Water Bodies and the Hydrometric Parameters: Case Study in Lithuania." Water 12, no. 2 (February 12, 2020): 500. http://dx.doi.org/10.3390/w12020500.

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The larger and deeper lakes and ponds are, the better the conditions for spontaneous water purification, slower hydrobiological processes and slower accumulation of sediment. The goal of this research was to assess the ecological status of selected Lithuanian lentic water bodies and the impact of morphometric indicators on water quality. Multiple studies were conducted on 29 lakes and 10 ponds located throughout Lithuania in 2014–2018. The study proved that higher maxima and average depths of lakes correlate with lower Ptotal, Ntotal yield and macrophyte taxonomic composition values, indicating higher ecological status class. Higher chlorophyll a EQR, ichthyofauna taxonomic composition indicator for Lithuanian fish index LFI and Lithuanian lakes’ macroinvertebrate index indicates a higher ecological class. Larger lake areas contain smaller amounts of Ptotal and Ntotal, indicating better ecological status class; higher ichthyophane taxonomic composition in LFI, zoobenthos taxonomic composition indicator for Lithuanian lakes’ macroinvertebrates index (LLMI) and taxonomic composition of macrophytes MRI indicate better ecological status class. Larger lake areas contain lower chlorophyll a EQR values. Rapid water exchange improves the condition of the lake in addition to nitrogen, phosphorus and chlorophyll a EQR values. The faster the water exchange in the lake is, the lower the Ptotal and Ntotal values; faster water exchange in the lake also means higher chlorophyll a EQR values. However, slower water exchange indicates better ecological status of the macrophytic taxonomic composition of the MRI, the ichthyofauna taxonomic composition and the Lithuanian lakes’ macroinvertebrates index indicator of zoobenthos.

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Völker, J., S. Richter, D. Borchardt, and V. Mohaupt. "Risk and monitoring based indicators of receiving water status: alternative or complementary elements in IWRM?" Water Science and Technology 67, no. 1 (January 1, 2013): 33–39. http://dx.doi.org/10.2166/wst.2012.526.

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The European Water Framework Directive (WFD) was enacted in the year 2000 with a stepwise approach. After legal implementation in the various member states large efforts were undertaken for the initial characterization of water bodies, risk assessment, to implement extensive monitoring schemes and to develop management plans at different aggregation levels by the year 2010. The initial characterization process and risk assessment had to be finalized by 2004 and delineated water bodies including a typological classification and identified the significant pressures and impacts in a screening procedure. In parallel, monitoring programmes and new biological indicator systems were developed in order to proof and refine the results of the risk assessment with an ecological indicator based assessment in a subsequent step which was finalized in 2009. Although the risk assessment for Germany was based on existing data that were originally collected for other purposes and came from a large variety of environmental or economical sectors, the results differ only slightly from the monitoring and indicator based information with respect to classifications of the ‘ecological status’ and ‘chemical status’. From this result we conclude that a risk assessment based on a careful application and intelligent combination of existing data sources with proven quality allows the recognition of trends and the identification of priorities for action of measures already at an early stage of a management process. However, monitoring schemes and advanced sets of ecological indicators are essential in later management steps both for narrowing uncertainties remaining from the risk assessment and to allow for effect controls of implemented measures. Moreover, these monitoring indicators should differentiate the effects of multiple stressors more factor specific and with respect to ecosystem states and functions. In conclusion, we see risk and indicator based assessments as complementary elements in Integrated Water Resources Management (IWRM), which have to be linked in systematic and phased procedures.

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Zhu, Juanjuan, Nicolas Tremblay, and Yinli Liang. "A Corn Nitrogen Status Indicator Less Affected by Soil Water Content." Agronomy Journal 103, no. 3 (May 2011): 890–98. http://dx.doi.org/10.2134/agronj2010.0351.

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Stagno, F., A. Giuffrida, and F. Intrigliolo. "CANOPY TEMPERATURE AS AN INDICATOR OF WATER STATUS IN CITRUS TREES." Acta Horticulturae, no. 889 (March 2011): 347–53. http://dx.doi.org/10.17660/actahortic.2011.889.42.

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Safavi, Hamid R., Vahid Raghibi, Omid Mazdiyasni, and Mohammad Mortazavi-Naeini. "A new hybrid drought-monitoring framework based on nonparametric standardized indicators." Hydrology Research 49, no. 1 (March 3, 2017): 222–36. http://dx.doi.org/10.2166/nh.2017.266.

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Abstract A drought is a multi-dimensional event characterized by changes in the atmospheric and land conditions. Hence, monitoring a single drought indicator may be insufficient for water management. The hybrid drought index (HDI) is presented as a nonparametric composite indicator for monitoring multiple components of the hydrologic cycle. The properties of the HDI can be summarized as follows: (1) HDI describes drought indicated from either climatic anomalies or available water (AW); (2) HDI describes the drought onset as early as a decrease appears in climatic variables, while it shows drought persistence until there is no longer a terrestrial deficit; and (3) HDI shows a more severe drought condition when both the climatic water balance and AW exhibit a deficit. HDI is based on the states of potential meteorological water budget and AW. The proposed integrated drought-monitoring is applied to the Zayandehrud River Basin of Iran to show the status of components and depict drought propagation through each one from climate to groundwater. Finally, HDI announces the general status of the hydrologic cycle. A monitoring system established based on HDI would also allow the managers, local businesses, and farmers to identify the status of water supply capacity and water availability.

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Choné, Xavier, Olivier Trégoat, Cornelis Van Leeuwen, and Denis Dubourdieu. "Vine water deficit : among the 3 applications of pressure chamber, stem water potential is the most sensitive indicator." OENO One 34, no. 4 (December 31, 2000): 169. http://dx.doi.org/10.20870/oeno-one.2000.34.4.996.

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Vine water status is an important factor in grape quality. High tannin and anthocyanin content in red grape berries are related to moderate vine water deficits. Hence, a simple and sensitive indicator is required to determine vine water status and especially water constraint. Pressure chamber allows a quick and easy to practice determination of water status in the vineyard. Three applications of pressure chamber are known: predawn leaf water potential (ΨB), leaf water potential (ΨF) and stem water potential (ΨT). Only ΨB and ΨF are widely used on vines. In this survey ΨB, ΨF, ΨT and transpiration flow were measured on mature leaves to determine non-irrigated vine water status in field grown vines during the growing season. In California as well as in France, stem Ψ was the most discriminating indicator for both moderate and severe water deficits. In every plot surveyed ΨT was much better correlated to leaf transpiration than ΨF. Moreover, ΨT revealed nascent water deficit earlier than ΨB did. Among the three application of pressure chamber, ΨT was the only one to indicate short term water deficit after a rainfall. Hence, ΨT appears to be a useful indicator for grapevine management in both non-irrigated and irrigated vineyards.

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Morinaga, Kunihisa, Kenichiro Koga, Hiroto Iga, Naoto Endo, Yuichiro Fujii, Hideharu Yokoi, Norihiro Hoshi, Fumio Fukuda, and Hiroshi Yakushiji. "Evaluation of Definitive Water Status Using the ‘Water Stress Indicator Sheet’ in Deciduous Fruit Trees." Horticultural Research (Japan) 15, no. 4 (2016): 401–7. http://dx.doi.org/10.2503/hrj.15.401.

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15

Villela, F. A. "Water relations in seed biology." Scientia Agricola 55, spe (1998): 98–101. http://dx.doi.org/10.1590/s0103-90161998000500018.

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The water relations play a fundamental role in seed biology. Thus, the purpose of the present paper was to analyze the performance of water status in seed development and germination. The researches have suggested that the water potential of the seed or seed structures provides a better indicator of the seed water status than water content. The seed water status plays a regulatory role in seed development and germination.

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Morandi, B., F. Boselli, A. Boini, L. Manfrini, and L. Corelli. "The fruit as a potential indicator of plant water status in apple." Acta Horticulturae, no. 1150 (January 2017): 83–90. http://dx.doi.org/10.17660/actahortic.2017.1150.12.

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17

Nastova, Rodne, Vasil Kostov, Natasha Gjorgovska, and Vesna Levkov. "BENTHIC FAUNA STATUS AS INDICATOR OF WATER QUALITY ASSESSMENT IN STREZHEVO ACCUMULATION." Macedonian Journal of Animal Science 4, no. 1 (2014): 37–43. http://dx.doi.org/10.54865/mjas1441037n.

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Navarro, Alejandra, Miguel Portillo‐Estrada, and Reinhart Ceulemans. "Identifying the best plant water status indicator for bio‐energy poplar genotypes." GCB Bioenergy 12, no. 6 (May 3, 2020): 426–44. http://dx.doi.org/10.1111/gcbb.12687.

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Ballester, C., I. Buesa, L. Bonet, and D. S. Intrigliolo. "Usefulness of stem dendrometers as continuous indicator of loquat trees water status." Agricultural Water Management 142 (August 2014): 110–14. http://dx.doi.org/10.1016/j.agwat.2014.04.019.

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Drechsler, Kelley, Isaya Kisekka, and Shrinivasa Upadhyaya. "A comprehensive stress indicator for evaluating plant water status in almond trees." Agricultural Water Management 216 (May 2019): 214–23. http://dx.doi.org/10.1016/j.agwat.2019.02.003.

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Yang, J. F., K. Lei, S. T. Khu, F. Qiao, and Q. Liu. "Assessment of water ecological carrying capacity using an indicator-based method applied to Tieling City, China." Water Supply 15, no. 5 (April 20, 2015): 940–47. http://dx.doi.org/10.2166/ws.2015.051.

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Water ecological carrying capacity (WECC) refers to the ability of a water ecosystem to support and withstand economic and social development. WECC assessments can provide helpful information for resolving water issues. Since WECC involves a wide range of influence factors, indicator-based methods are useful tools for this type of evaluation. However, there are still some imperfections in the existing indicator-based methods for WECC evaluation, primarily in the aspects of index frameworks, indicator selection and evaluation criteria. Based on the pressure-support force-state index framework, this paper presents an indicator-based WECC evaluation method (PSSM). Using PSSM, overall WECC evaluation can be obtained by assessing the pressure of socio-economic development on the water ecosystem, the support from the water ecosystem for human development, and the health status of the water ecosystem. PSSM is directly focused on the pressure-support effect, and fully considers the determinant influence on WECC of the health status of the water ecosystem. The application of PSSM in Tieling City shows that further reduction in the pressure that comes from socio-economic development is still required, and the health status of the water ecosystem should be further improved.

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Conesa, Conejero, Vera, Ramírez-Cuesta, and Ruiz-Sánchez. "Terrestrial and Remote Indexes to Assess Moderate Deficit Irrigation in Early-Maturing Nectarine Trees." Agronomy 9, no. 10 (October 11, 2019): 630. http://dx.doi.org/10.3390/agronomy9100630.

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Monitoring plant water status is relevant for the sustainable management ofirrigation under water deficit conditions. Two treatments were applied to an early-maturingnectarine orchard: control (well irrigated) and precise deficit irrigation (PDI, based on soilwater content thresholds). Moderate water deficits generated by PDI were assessed bycomparing terrestrial: stem water potential (Ψstem) and gas exchange parameters, with remote:canopy temperature, normalized difference vegetation (NDVI), and soil adjusted vegetationindex (SAVI), plant water status indicators. The Ψstem was the only indicator that showedsignificant differences between treatments. NDVI and SAVI at the postharvest period wereappropriate indexes for estimating winter pruning, although they did not serve well as plantstress indicator. Vapor pressure deficit along with Ψstem values were able to predict remotesensing data. Ψstem and canopy to air temperature difference values registered the highestsignal intensity and NDVI the highest sensitivity for detecting water deficit situations. Theresults suggest that care should be taken when using instantaneous remote indicators toevaluate moderate water deficits in deciduous fruit trees; more severe/longer water stressconditions are probably needed. The proposed PDI strategy promoted water saving whilemaintaining yield, and could be considered a promising tool for semi-arid agrosystems.

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Hoshi, Norihiro, Kunihisa Morinaga, Hideharu Yokoi, Eriko Hamade, Sinnosuke Kusaba, and Masahiko Shimazaki. "Development of a Water Stress Indicator for Simple Estimation of Water Status in Satsuma Mandarin Trees." Horticultural Research (Japan) 6, no. 4 (2007): 541–46. http://dx.doi.org/10.2503/hrj.6.541.

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Doganovsky, Arkady M. "External water exchange of lakes as the integral indicator of water body types." Limnological Review 12, no. 1 (March 1, 2012): 11–17. http://dx.doi.org/10.2478/v10194-011-0040-2.

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Abstract External water exchange of overflow lakes is presented as the integral indicator, defining the type of lake basin. Intensity of water replacement in the lake (Kw) determines many processes taking place in the lake and its drainage area. Simultaneously this process influences the runoff of the outflowing river. Among the processes in the lake, depending on Kw, transitory-accumulative possibilities, predominance of allochton and limnic processes, and the participation of Kw in forming trophic status are considered. Some examples of the dependence of the parameters of lake level distribution curves upon the Kw values are given. The problem of calculation of Kw for unexplored objects is also regarded. The text contains specific examples of the results of calculations and analysis.

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Barinova, Sophia. "Plants, Mosses, Charophytes, Protozoan, and Bacteria Water Quality Indicators for Assessment of Organic Pollution and Trophic Status of Continental Water Bodies." Transylvanian Review of Systematical and Ecological Research 23, no. 3 (November 1, 2021): 17–36. http://dx.doi.org/10.2478/trser-2021-0018.

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Abstract This paper presents data compilation for indicator species of organic pollution and trophic state of continental waters. Information was collected from research papers, monographs, electronic resources, and our research. Altogether 316 species of higher plants, plants, mosses, charophytes, protozoan, and bacteria from 11 taxonomical phyla are represented with ecological preferences for saprobity indicators with saprobity index (S) and indicators of trophic state. This comprehensive data can be used for the purpose of aquatic ecosystem assessment and monitoring of water quality based on bioindication methods.

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Boldanova, Elena V. "EVALUATION OF THE TROPHIC STATUS OF LAKE BAIKAL USING REMOTE SENSING." Географический вестник = Geographical bulletin, no. 2(61) (2022): 73–89. http://dx.doi.org/10.17072/2079-7877-2022-2-73-89.

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The existing models for assessing the trophicity indicators of water bodies are intended for specific water bodies, and adaptation is required for their use with regard to others. Another problem is the lack of approaches in remote monitoring to the development of an integral indicator of the trophicity of water bodies. The purpose of this study is to develop models for calculating biotic and abiotic indicators for assessing the state of a reservoir, as well as an integral indicator of its trophicity. To achieve this goal, the tasks were set to compare the possibilities of using satellite images to assess water bodies, to calculate the trophic indicators of Lake Baikal according to existing models, adapting them, if necessary, to develop models for calculating biotic and abiotic indicators, to develop an integral assessment of the trophicity of Lake Baikal, and describe the algorithm for obtaining it. The object of the study is Lake Baikal. The subject of the study is the assessment of the reservoir’s trophicity. In terms of theoretical and methodological basis, the study relies on research works of Russian and foreign authors in the field of assessing the trophicity of water bodies, geographic information systems (GIS) as well as Earth remote sensing data (ERS). The methods of spatial analysis and correlation-regression analysis were used. The empirical and information-statistical bases of the work include statistical and analytical publications in the press on the topic under study, statistical data of the Russian Federation, foreign statistics, data from seminars and conferences on the problems of assessing the trophicity of water bodies, and the use of GIS and remote sensing data in assessing the state of water bodies. The scientific and practical novelty and significance of the results obtained lie in the development of an algorithm for assessing the trophicity of the reservoir using GIS and remote sensing. The parameters of models for calculating the Secchi disk transparency and chlorophyll-a concentration have been estimated. It is proposed to use rank assessment for express evaluation of the trophicity of water bodies, and an appropriate scale has been developed to determine the type of trophicity of the reservoir. An algorithm for estimating the trophicity of the reservoir is described.

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Gaudillère, Jean-Pierre, Xavier Choné, Cornelis Van Leeuwen, and Olivier Trégoat. "The assessment of vine water and nitrogen uptake by means of physiological indicators influence on vine development and berry potential (Vitis vinifera L. cv Merlot, 2000, Bordeaux)." OENO One 36, no. 3 (September 30, 2002): 133. http://dx.doi.org/10.20870/oeno-one.2002.36.3.967.

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Vine water and nitrogen uptake can be assessed by means of physiological indicators in field conditions. In this study, pre-dawn leaf water potential (ψB) and stem water potential (ψT) were used to indicate vine water status of Vitis vinifera L cv. Merlot. Carbon isotope composition of grape sugar (ΔC13) was used as an integrative indicator of vine water deficit during the ripening period. Must assimilable nitrogen and leaf blade colour intensity, were used to assess vine nitrogen status. All of the three indicators of vine water status allowed a clear differentiation of vine water uptake conditions in the ten experimental plots. The indicators of vine nitrogen status showed more ambiguous results. Must assimilable nitrogen content did not only vary with vine nitrogen uptake, but also with yield. Leaf colour was more easy to interpret. Vine development and berry composition were more influenced by water uptake conditions than by vine nitrogen status. In 2000, which was a dry vintage in Bordeaux, water stress induced early growth slackening and a small berry size. Grapes contained more sugar, anthocyanin and total phenolics and less malic acid when water availability was low. On plots where water uptake conditions were similar, low vine nitrogen status increased berry potential.

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Ru, Chen, Xiaotao Hu, Wene Wang, Hui Ran, Tianyuan Song, and Yinyin Guo. "Evaluation of the Crop Water Stress Index as an Indicator for the Diagnosis of Grapevine Water Deficiency in Greenhouses." Horticulturae 6, no. 4 (November 20, 2020): 86. http://dx.doi.org/10.3390/horticulturae6040086.

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Precise irrigation management of grapevines in greenhouses requires a reliable method to easily quantify and monitor the grapevine water status to enable effective manipulation of the water stress of the plants. This study evaluated the applicability of crop water stress index (CWSI) based on the leaf temperature for diagnosing the grapevine water status. The experiment was conducted at Yuhe Farm (northwest China), with drip-irrigated grapevines under three irrigation treatments. Meteorological factors, soil moisture contents, leaf temperature, growth indicators including canopy coverage and fruit diameter, and physiological indicators including SPAD (relative chlorophyll content), stem water potential (φs), stomatal conductance (gs), and transpiration rate (E) were studied during the growing season. The results show that the relationship between the leaf-air temperature difference (Tc-Ta) and the plant water status indicators (φs, gs, E) were significant (P < 0.05), and the relationship between gs, E and Tc-Ta was the closest, with R2 values ranging from 0.530–0.604 and from 0.545–0.623, respectively. CWSI values are more easily observed on sunny days, and it was determined that 14:00 BJS is the best observation time for the CWSI value under different non-water-stressed baselines. There is a reliable linear correlation between the CWSI value and the soil moisture at 0–40 cm (P < 0.05), which could provide a reference when using the CWSI to diagnose the water status of plants. Compared with the Tc-Ta value, the CWSI could more accurately monitor the plant water status, and above the considered indictors, gs has the greatest correlation with the CWSI.

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Wu, Shuqin. "Application of ITC cucumber fertilizer and water control system." Trends in Horticulture 4, no. 1 (December 12, 2021): 142. http://dx.doi.org/10.24294/th.v4i1.1809.

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In order to optimize the environmental factors for cucumber growth, a fertilizer and water control system was designed based on the Internet of Things (IoT) system. The IoT system monitors environmental factors such as temperature, light and soil Ec value, and uses image processing to obtain four growth indicators such as cucumber stem height, stem diameter size, number of leaves and number of fruit set to establish a single growth indicator model for temperature, light, soil Ec value and growth stage, and the four growth indicators were fused to obtain the comprehensive growth indicator Ic for cucumber, and calculates its deviation to determine the cucumber growth status. Based on the integrated growth index Ic of cucumber, a soil Ec control model was established to provide the optimal environment and fertilizer ration for cucumber at different growth stages to achieve stable and high yield of cucumber.

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Lim, Katie L. H., Richard D. Pancost, Edward R. C. Hornibrook, Peter J. Maxfield, and Richard P. Evershed. "Archaeol: An Indicator of Methanogenesis in Water-Saturated Soils." Archaea 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/896727.

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Oxic soils typically are a sink for methane due to the presence of high-affinity methanotrophicBacteriacapable of oxidising methane. However, soils experiencing water saturation are able to host significant methanogenic archaeal communities, potentially affecting the capacity of the soil to act as a methane sink. In order to provide insight into methanogenic populations in such soils, the distribution of archaeol in free and conjugated forms was investigated as an indicator of fossilised and living methanogenic biomass using gas chromatography-mass spectrometry with selected ion monitoring. Of three soils studied, only one organic matter-rich site contained archaeol in quantifiable amounts. Assessment of the subsurface profile revealed a dominance of archaeol bound by glycosidic headgroups over phospholipids implying derivation from fossilised biomass. Moisture content, through control of organic carbon and anoxia, seemed to govern trends in methanogen biomass. Archaeol and crenarchaeol profiles differed, implying the former was not of thaumarcheotal origin. Based on these results, we propose the use of intact archaeol as a useful biomarker for methanogen biomass in soil and to track changes in moisture status and aeration related to climate change.

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Takić, Ljiljana, Ivana Mladenović-Ranisavljević, Milovan Vuković, and Ilija Mladenović. "Evaluation of the Ecochemical Status of the Danube in Serbia in Terms of Water Quality Parameters." Scientific World Journal 2012 (2012): 1–6. http://dx.doi.org/10.1100/2012/930737.

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The Danube is an international river passing partly through Serbia. The protection of the environment and sustainable use of water resources is a primary task that implies constant monitoring of the quality status and evaluation of ecochemical status of the water in the Danube basin. The investigation includes calculation of all-inclusive water quality by the Serbian water quality index (SWQI) method and an evaluation of eco-chemical status of the Danube water in terms of water quality parameters from the entry to the exit point along its course through Serbia in the year of 2009. The results show that the overall quality of the Danube water on the territory of Serbia corresponds to the descriptive indicator of “very good” water. According to theCouncil Directive 75/440/EEC, the evaluation of the ecostatus, with slight deviation of individual parameters at Pančevo, corresponds to A1 category of the surface water quality intended for the abstraction of drinking water supplies in member states.

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Tortorello, Mary L. "Indicator Organisms for Safety and Quality—Uses and Methods for Detection: Minireview." Journal of AOAC INTERNATIONAL 86, no. 6 (November 1, 2003): 1208–17. http://dx.doi.org/10.1093/jaoac/86.6.1208.

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Abstract Indicator organisms have been used for nearly a century to assess the microbiological status of water and foods. Beginning with their use in water sanitation programs, their applications have been extended over the years to other products, and they have become important components of the microbiological testing programs of both industry and regulatory agencies. Functionally, they may be viewed as safety or quality indicators. Safety indicators suggest the presence of conditions associated with increased risk of exposure to a pathogen. Quality indicators assess conditions of importance to product manufacture or consumer acceptability. This minireview summarizes the history, use, and analytical methods for the most commonly used indicator organisms, including the aerobic plate count, yeasts and molds, the coliform groups, Escherichia coli, Enterobacteriaceae, and Listeria.

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Petersen, Tina M., Monica P. Suarez, Hanadi S. Rifai, Paul Jensen, Yu-Chun Su, and Ron Stein. "Status and Trends of Fecal Indicator Bacteria in Two Urban Watersheds." Water Environment Research 78, no. 12 (November 2006): 2340–55. http://dx.doi.org/10.2175/106143006x102033.

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34

Gaudillère, Jean‐Pierre, Cornelius Van Leeuwen, and Nathalie Ollat. "Carbon isotope composition of sugars in grapevine, an integrated indicator of vineyard water status." Journal of Experimental Botany 53, no. 369 (April 1, 2002): 757–63. http://dx.doi.org/10.1093/jexbot/53.369.757.

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Pociecha, Agnieszka, Irena Bielańska-Grajner, Hanna Kuciel, and Agata Z. Wojtal. "Is zooplankton an indicator of the water trophic level in dam reservoirs?" Oceanological and Hydrobiological Studies 47, no. 3 (September 25, 2018): 288–95. http://dx.doi.org/10.1515/ohs-2018-0027.

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Abstract The trophic state of ten dam reservoirs was assessed using a zooplankton community. In order to determine the trophic state of dam reservoirs, we used indices calculated on the basis of density and species structure of Rotifera and Crustacea communities. Samples were collected once during summer 2012 in ten dam reservoirs. The largest numbers of zooplankton taxa were found in a lowland high meso-eutrophic dam reservoir (Koronowski) and the lowest ones in a submontane low eutrophic dam reservoir (Lubachowski). The trophic state was determined for the investigated dam reservoirs. In the case of the Rotifera community, the percentage of the tecta form in the Keratella cochlearis population and the proportion of high-trophic species in the total species density were the best indices to describe the water trophic status. In the case of the crustacean community, the best indices were the density of Crustacea and the biomass of Cyclopoida. The high value of all indices calculated on the basis of density and species structure of Rotifera and Crustacea was determined for Zygmunt August Lake, whose trophic status was defined as highly eutrophic to polytrophic. Our study has shown that zooplankton could be a good ecosystem indicator of the water trophic level in dam reservoirs.

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Bernardi, A. L. "Branch water potential; a useful indicator of plant water potential in comparison to leaf water potential in canola." Australian Journal of Experimental Agriculture 40, no. 5 (2000): 687. http://dx.doi.org/10.1071/ea99128.

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The water potentials of canola branches and leaves were compared using a pressure chamber to determine whether they produced similar results. This study also investigated the magnitude of errors in the water status of canola resulting from re-cutting the branches, and the effects of delaying readings. The use of branches containing pods or pods and flowers/buds gave very good correlation with leaves. As this is the area of greatest photosynthesis and transpiration from mid-flowering, it provides an easily obtainable source material close to the main growth areas to measure plant water potential. Storage of both leaves and stems before measurement is an acceptable procedure if a large number of samples are required to be completed or portable equipment is not available provided precautions are taken to prevent moisture loss. Re-cutting the branch leads to lower water potential and should be avoided.

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CEULEMANS, R., I. IMPENS, M. C. LAKER, F. M. G. VAN ASSCHE, and R. MOTTRAM. "NET CO2 EXCHANGE RATE AS A SENSITIVE INDICATOR OF PLANT WATER STATUS IN CORN (Zea mays L.)." Canadian Journal of Plant Science 68, no. 3 (July 1, 1988): 597–606. http://dx.doi.org/10.4141/cjps88-072.

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With the objective to evaluate and compare different physiological plant parameters as indicators of water stress, net CO2 exchange rate (NCER), leaf temperature, predawn and daytime leaf water potential were monitored diurnally on last fully expanded leaves of corn (Zea mays L.) plants under two different soil water treatments (stressed and nonstressed) during a 10-d period at anthesis in a semi-arid region in South Africa. Profile available water capacity (PAWC) was used to express the soil water contents during the experiments. A significant decrease in NCER was noticed as soon as 30% of PAWC was extracted, i.e. 2 or 3 d after irrigation. Although the results were limited to a short, well-defined measuring period, NCER, and especially NCER at noon, seemed to be a more sensitive and more reliable indicator of corn water stress than, for example, predawn or daytime leaf water potential, at least under the conditions studied here. This reduction in NCER might have a significant impact on total biomass, rooting density, flower and ear formation.Key words: Corn, irrigation scheduling, photosynthesis, leaf water potential, profile available water capacity, soil water content

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Bross, Lisa, Ina Wienand, and Steffen Krause. "Batten Down the Hatches—Assessing the Status of Emergency Preparedness Planning in the German Water Supply Sector with Statistical and Expert-Based Weighting." Sustainability 12, no. 17 (September 2, 2020): 7177. http://dx.doi.org/10.3390/su12177177.

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Emergency preparedness planning in the water supply sector includes preventive measures to minimize risks as well as aspects of crisis management. Various scenarios such as floods, power failures or even a pandemic should be considered. This article presents a newly developed composite indicator system to assess the status of emergency preparedness planning in the German water supply. Two weighting methods of the indicators are compared: the indicator system was applied to a case study and a Germany-representative data set. The results show that there is a need for action in emergency preparedness planning in the German water supply. This is in particular due to a lack of risk analyses and insufficient crisis management. Numerous water supply companies and municipalities are already well-prepared, however, there is a need for action at several levels, especially in the area of risk analysis and evaluation of measures. In Germany, responsibility for this lies primarily with the municipalities.

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Alvares, Adalgisa D. D. G., Budiarsa Suyasa, and Syamsul A. Paturusi. "STATUS DAN STRATEGI PENGELOLAAN LINGKUNGAN PERHOTELAN DI KAWASAN KOTA MADYA DILI TIMOR - LESTE." ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) 11, no. 1 (May 1, 2017): 23. http://dx.doi.org/10.24843/ejes.2017.v11.i01.p04.

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STATUS AND STRATEGY OF HOSPITALITY ENVIRONMENTAL MANAGEMENT IN DILI TOWN TIMOR - LESTEThe research held about to reach two goals. To find out the condition and the strategy about the management of hotel environment at Dili. The decision of area research is held with purposive. All hotel in Dili will be chosen as the samples, it means that it will be held with census. Next, as the respondents in this research is the manager of the hotels. The result of this research shows that there are seven variables. They are the loyalty for its regulation, the programme and appreciation of environment, green park and space, the management of waste water, the management of rubbish, the management of emission, the management of non enviromental things. The indicator of the regulation (rules) of the company can be identified by using AMDAL document. The indicator of the programme and appreciation of environment can be identified by using the policy and appreciation that is dotained from this environment. The indicator of waste water management, can be recognized by using IPAL. The indicator of rubbish management can be recognized by using its mechanism. The indicator of emission management can be recognized by using its mechanism. The indicator of non environmental things management can be identified by using its mechanism. The level of this implementation for the hotel environment at Dili is about 65,08 % (Fairly). The implementation of per variable can be seen that the percentage of the loyalty for its regulation is about 74,8 % (good), the programme and appreciation of environment is about 44 % (not good), green park and space is about 76,8 % (good), the management of waste water is about 81,6 % (good), the management of rubbish is about 60,8 % (fairly), the management of emission is about 63,2 % (fairly), the non enviromental things management is about 54,4 % (fairly). The indicator supported by the environment needs the attention of hotel management which improves the hotel image for tourist or guests in the hotel.

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Zhu, Guo Wei, Yun Ya Xiao, and Chencheng Wan. "The Study of Indicator Framework of Cleaner Production in the Tertiary Industry." Applied Mechanics and Materials 295-298 (February 2013): 759–62. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.759.

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This paper gives the contents of the Cleaner Production of the pilot units(scene, hotel, campus) by combining the developing status in the tertiary industry, and through deep theory probing, concludes the indicator framework in this field and shows the reference for the sustainable development in the tertiary industry in China.And the framework concerns such aspects as environmental quality(water,air,noise) and other indicaotrs respectively. It ranges the Cleaner Production level of the tertiary industry into six status like The best , Very good, ordinary, somewhat, danger, and the worst.

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Boikova, Elmīra, Uldis Botva, and Vita Līcīte. "Implementation of Trophic Status Index in Brackish Water Quality Assessment of Baltic Coastal Waters." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. 62, no. 3 (January 1, 2008): 115–19. http://dx.doi.org/10.2478/v10046-008-0016-z.

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Implementation of Trophic Status Index in Brackish Water Quality Assessment of Baltic Coastal Waters The assessment of the trophic state of marine coastal waters is one of the leading initiatives declared in the European Water Framework Directive (WFD). The Baltic Sea is a semi-enclosed ecosystem which consists of subregions with wide salinity and seasonality gradients. Anthropogenic impact results in eutrophication processes on different scales. Efficient eutrophication control and environmental management in the Baltic Sea, according to WFD, requires a prerequisite of common and sensitive indicators for the European coastal waters including the Baltic Sea. In this article the Trophic Status Index TRIX, recently succcesfully implemented in Mediterranean and Northern European sea coastal waters as a holistic approach indicator, was implemented for the Gulf of Rīga and Latvian Baltic Sea coastal water quality assessment between 1999 and 2005.

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Alonso, C., E. Pereira, F. Bertoglio, M. De Cáceres, and R. Amann. "Bacterioplankton composition as an indicator of environmental status: proof of principle using indicator value analysis of estuarine communities." Aquatic Microbial Ecology 88 (January 13, 2022): 1–18. http://dx.doi.org/10.3354/ame01979.

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Increasing awareness of environmental impacts caused by anthropogenic activities highlights the need to determine indicators of environmental status that can be routinely assessed at large spatial and temporal scales. Microbial communities comprise the greatest share of biological diversity on Earth and can rapidly reflect recent environmental changes while providing a record of past events. However, they have rarely been targeted in the search for ecological indicators of habitat types, environmental conditions, or environmental changes. Here, as a proof of principle, we analysed the bacterioplankton community composition of 4 estuaries in North and South America, Europe, and Asia, and looked for indicators of groups of samples defined using partition techniques, according to primary physicochemical variables typically monitored to infer water quality. Indicator value analysis (IndVal) was conducted to identify indicator operational taxonomic units (OTUs; analogous to species in other fields of ecology) in each group. These bacterioplankton-based indicators exhibited a high capacity to predict the group membership of the samples within each estuary and to correctly assign the samples to the appropriate estuary in a combined data set, employing different machine learning techniques. The indicators were composed of OTUs belonging to several bacterial phyla, which responded significantly and differentially to the environmental variables used to define the groups of samples. Moreover, the predictive values of these bacterial indicators were generally higher than those of other biological assemblages commonly used for environmental monitoring. Therefore, this approach appears to be a promising tool to complement existing strategies for monitoring and conservation of aquatic systems worldwide.

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Yan, Bin, Dehui Liu, Zhenwei Gao, Qi Cao, and Jiabin Chai. "Water Quality Evaluation and Variation Trend Analysis of Rivers Upstream of the Dahuofang Reservoir in China." Water 14, no. 9 (April 27, 2022): 1398. http://dx.doi.org/10.3390/w14091398.

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The Dahuofang Reservoir is one of the most important water sources in Liaoning Province, China, so it is critical to identify the status and evolution characteristics of its water quality. Six monitoring indicators were selected to analyze water quality differences and variation trends of each indicator in three inlet sections of the reservoir during different hydrological periods from 2003 to 2021, and an improved comprehensive pollution index method was proposed to study the pollution variation trends. The results showed three findings. (1) The water quality of the three rivers is better in high water periods than that in low water periods. (2) In terms of the spatial state of the water environment, water quality of the Hun River is the worst, the Suzi River is poor, and the She River is better. The worst indicator of the three rivers, TN (total nitrogen), has exceeded the standard for many years (Grade IV–Inferior Grade V). TP (total phosphorus) in the Hun River, which has deteriorated severely since 2013 and is positively correlated with rainfall; it is mainly influenced by pollution from agricultural activities. (3) The P value obtained by the improved method is lower than that of original method, which is mainly because TN is relatively stable, and the exceeding standard of TP is not as serious as TN. The improved method takes into account the interactions and fluctuations of indicators, so that it can reflect the pollution situation more scientifically. These results are helpful to evaluate the pollution status of surface water. It is suggested that water be transferred appropriately to improve water quality and take necessary management measures to reduce TN and TP in the Hun River.

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Raveh, Eran, and Yoseph Levy. "Analysis of xylem water as an indicator of current chloride uptake status in citrus trees." Scientia Horticulturae 103, no. 3 (January 2005): 317–27. http://dx.doi.org/10.1016/j.scienta.2004.06.007.

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PEÑUELAS, J., I. FILELLA, C. BIEL, L. SERRANO, and R. SAVÉ. "The reflectance at the 950–970 nm region as an indicator of plant water status." International Journal of Remote Sensing 14, no. 10 (July 1993): 1887–905. http://dx.doi.org/10.1080/01431169308954010.

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Ueda, Masafumi, and Ei'ichi Shibata. "Diurnal changes in branch diameter as indicator of water status of Hinoki cypress Chamaecyparis obtusa." Trees 15, no. 6 (August 15, 2001): 315–18. http://dx.doi.org/10.1007/s004680100113.

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Cahyonugroho, Okik Hendriyanto, Sucipto Hariyanto, and Ganden Supriyanto. "Efforts to Mitigate the Quality of Surabaya River Water as a Drinking Water Source." MATEC Web of Conferences 372 (2022): 05010. http://dx.doi.org/10.1051/matecconf/202237205010.

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The aim of this study is to decide the strategy of mitigating the quality of river water of the Surabaya River as raw source for drinking water. The study was carried out during both the rainy (January – February 2021) and dry seasons (September – October 2021). Research sampling uses random sampling in term of observation at four Locations with different activities. The sample obtained was tested for its quality of water indicators, such as temperature, brightness, pH, dissolved oxygen, organic matter, nitrates,and phosphates). The results showed that indicator of pH, temperature, and nitrates, met class II water qualitystandards. However, indicators of dissolved oxygen, organic matter, and phosphates had not met class II as stated in the Regulation of Government 82/2001. Lightly pollution identified the water quality status of the Surabaya River in the rainy and dry seasons. As a result, efforts to mitigate water quality were required,including regulating water infiltration, monitoring water quality at water sources, conducting afforeLocation programs, reorganizing settlements and industries on watershed banks, and incorporating biological treatment using biofilter technology into the Surabaya River's initial water treatment process.

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Chang, Kui, Jin Liang Gao, Wen Yan Wu, and Yi Xing Yuan. "Water quality comprehensive evaluation method for large water distribution network based on clustering analysis." Journal of Hydroinformatics 13, no. 3 (February 3, 2011): 390–400. http://dx.doi.org/10.2166/hydro.2011.021.

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In order to evaluate water quality for a large water distribution network comprehensively, a two-stage classification method was used and the clustering methods, self-organizing map (SOM), K-means method and fuzzy c-mean (FCM), were represented. With these clustering methods, the pipes of a large real water distribution network were divided into some groups considering one or more water quality indicators synchronously. The water quality indicators of residual chlorine, water age, THMs, TAAs, TOC and BDOC are used in this paper. Residual chlorine and water age are two main water quality indicators. THMs and TAAs can represents the disinfection byproducts information. And TOC and BDOC are used to represents biological stability. According to the clustering results, the status of water quality of the water network was analysed. The results showed that the classification of SOM could express the comprehensive water quality in a water distribution network (WDN) directly and vividly by high-dimension water quality indicator projection to a low dimensional topology grid and that two-stage classification method has higher efficiency in comparison to the traditional clustering method. Water quality comprehensive evaluation was of significance for locating water quality monitoring, water network rehabilitation and expansion.

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Shornikova, Elena Aleksandrovna. "A methodical approach to the ecological status evaluation of water bodies using the complex index of water quality on the example of the Middle Priobye." Samara Journal of Science 8, no. 2 (April 1, 2019): 75–80. http://dx.doi.org/10.17816/snv201982114.

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The following paper deals with a methodical approach and experience of water quality complex index ( Iwq ) use for the evaluation of ecological status of surface water bodies by results of rivers monitoring within the Middle Ob basin during 2002-2018. This index allows to use such primary information as results of water chemistry analyses, parameters of structure of microbial community and other available data obtained for each sample site on various water bodies within the basin. The main evaluation criterion for calculating this index is a degree of a deviation of each controlled indicator from average value of this indicator for all explored water area within the basin. Water bodies (or their sites) can be classified to 5 various classes of water quality using the calculated values of the index. Such a methodical approach allows to carry out comparative estimation of an ecological condition of water bodies and their sites within the area, to map the obtained data, to analyze possible reasons of deterioration of water ecosystem state, to manage decisions on their restoration. The paper presents the results of the water quality complex index use for rivers within the Middle Ob basin, calculated on the base of indicators of the chemical composition of water and number of bacteria of various ecological and trophic groups in the structure of microbial community.

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REIS, Lucas C., Silvana P.Q. SCALON, Daiane DRESCH, Andressa Caroline FORESTI, Cleberton C. SANTOS, and Zefa V. PEREIRA. "Chlorophyll a fluorescence as an indicator of water stress in Calophyllum brasiliense." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 48, no. 1 (March 31, 2020): 210–20. http://dx.doi.org/10.15835/nbha48111757.

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The objective of this study was to evaluate chlorophyll a fluorescence as a stress indicator in Calophyllum brasiliense Cambess seedlings grown with different concentrations of abscisic acid (ABA) under intermittent water deficit condition: daily irrigation without ABA (I); daily irrigation + 10 μM ABA (I 10); daily irrigation + 100 μM ABA (I 100); suspension of daily irrigation without ABA (SI); suspension of daily irrigation + 10 μM ABA (SI 10) and suspension of daily irrigation + 100 μM ABA (SI 100). The intermittent water deficit reduces water status and impairs the photochemical apparatus functioning and seedling quality. The fluorescence measurements helped identify the stress condition of water deficit in the cultivation of C. brasiliense and the beneficial effect of the application of 10 μM of ABA in minimizing stress and facilitating the recovery of seedlings after re-irrigation, while maintaining the integrity and function of the photosynthetic apparatus.

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Journal articles on the topic 'Water status indicator'

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