Water Research, Год журнала: 2025, Номер 283, С. 123874 - 123874
Опубликована: Май 20, 2025
Язык: Английский
Water Research, Год журнала: 2025, Номер 274, С. 123156 - 123156
Опубликована: Янв. 18, 2025
Язык: Английский
Процитировано
4
Scientific Reports, Год журнала: 2024, Номер 14(1)
Опубликована: Янв. 22, 2024
Abstract Detecting change in water quality is key to providing evidence of progress towards meeting objectives. A measure for detecting statistical power. Here we calculate power all regularly (monthly) monitored streams New Zealand test the effectiveness monitoring policy that aims decrease contaminant (phosphorus and nitrogen species, E. coli visual clarity) concentrations threshold levels 5 or 20 years. While > 95% sites had sufficient samples detect nutrients clarity over years, on average, sampling frequency would have double changes coli. Furthermore, clarity, dissolved reactive phosphorus increase up fivefold. The cost was predicted 5.3 4.1 times respectively. national model used demonstrate a similar number (and cost) be required any new sites. Our work suggests demonstrating outcomes implementing improvement may not occur without step investment into systems. Emerging technologies potential reduce cost, but existing networks also rationalised provide study has important implications decisions involving balancing need intensively sampled where rapidly versus other which long-term time series.
Язык: Английский
Процитировано
15
Journal of Geophysical Research Biogeosciences, Год журнала: 2024, Номер 129(2)
Опубликована: Фев. 1, 2024
Abstract Inland waters are significant emitters of greenhouse gases for the atmosphere and play an important role in global carbon cycle. With a vast land area East Asia spanning broad range climatic conditions, China has large number natural human‐made water bodies. These inland systems importance because their high emission fluxes. Over past decades, experienced unprecedented environmental changes driven by rapid economic development, which have profoundly modified its biogeochemistry associated emissions. This review focuses on dioxide (CO 2 ) methane (CH 4 dynamics from China's response to change. Major drivers CO CH emissions, including aquatic metabolism, hydrological factors, prevailing human impacts, examined. To advance our understanding emissions waters, we further identify several critical knowledge gaps, such as inadequate research headwater streams climate‐sensitive Tibetan Plateau ecosystems. Furthermore, insufficient undergoing extensive interventions (e.g., damming, flow regulation, pollution, farming practices aquaculture ponds) is highlighted. We suggest that future efforts should be made better capture spatiotemporal heterogeneity dissolved concentrations fluxes across well long‐term trends. overcome uncertainties sources current flux estimates, mechanistically understand transport transformation Chinese underlying processes particularly needed.
Язык: Английский
Процитировано
14
Journal of Environmental Management, Год журнала: 2024, Номер 352, С. 119959 - 119959
Опубликована: Янв. 9, 2024
Язык: Английский
Процитировано
11
Environmental Monitoring and Assessment, Год журнала: 2025, Номер 197(4)
Опубликована: Март 4, 2025
The use of high-frequency water quality monitoring has increased over several decades. This mostly been motivated by curiosity-driven research and significantly improved our understanding hydrochemical processes. Despite these scientific successes the growth in sensor technology, large-scale uptake managers is hampered a lack comprehensive practical guidelines. Low-frequency data are still routinely used to review environmental policies but prone missing important event-driven With changing climate where such processes more likely occur have greater impact, adoption becoming pressing. To prepare regulators hydrological agencies for new challenges, this paper reviews international best practice provision. As result, we summarise added value monitoring, describe practices sensors analysers field, evaluate experience with cleaning. We propose decision workflow that includes considerations needs, choice, maintenance calibration, structured processing. fills an knowledge-exchange gap between statutory surveillance future practitioners agencies.
Язык: Английский
Процитировано
2
Wiley Interdisciplinary Reviews Water, Год журнала: 2023, Номер 11(2)
Опубликована: Дек. 7, 2023
Abstract Processes that drive variability in catchment solute sourcing, transformation, and transport can be investigated using concentration–discharge (C–Q) relationships. These relationships reflect in‐stream processes operating across nested temporal scales, incorporating both short long‐term patterns. Scientists therefore leverage catchment‐scale C–Q datasets to identify distinguish among the underlying meteorological, biological, geological export patterns from catchments influence shape of their respective We have synthesized current knowledge regarding geological, meteorological on for various types diel decadal time scales. cross‐scale linkages tools researchers use explore these interactions Finally, we gaps our understanding dynamics as reflections processes. also lay foundation developing an integrated approach investigate relationships, reflecting biogeochemical effects environmental change water quality. This article is categorized under: Science Water > Hydrological Quality Environmental Change
Язык: Английский
Процитировано
23
Environmental Science & Technology, Год журнала: 2024, Номер 58(11), С. 4852 - 4858
Опубликована: Март 4, 2024
Agricultural headwaters are positioned at the interface between terrestrial and aquatic ecosystems and, therefore, margins of scientific disciplines. They deemed devoid biodiversity too polluted by ecologists, overlooked hydrologists, perceived as a nuisance landowners water authorities. While agricultural streams widespread represent major habitat in terms stream length, they remain understudied thereby undervalued. headwater significantly modified but same time critical linkages among land, air, ecosystems. exhibit largest variation streamflow, quality, greenhouse gas emission with cascading effects on entire networks, yet underrepresented monitoring, remediation, restoration. Therefore, we call for more intense efforts to characterize understand inherent variability sensitivity these global change drivers through regulatory monitoring improve their ecosystem conditions functions purposeful evidence-based remediation.
Язык: Английский
Процитировано
7
Water Research, Год журнала: 2024, Номер 264, С. 122108 - 122108
Опубликована: Июль 25, 2024
The profound influence of climate change on the hydrological cycle raises concerns about its potential impacts water quality, particularly in agricultural catchments. Here, we analysed 200 storm events monitored for nitrate and total phosphorus (TP) at sub-hourly intervals from 2016 to 2023 Kervidy-Naizin catchment (north-western France). Using Extreme Value theory, identified with extreme concentrations compared their hydroclimatic characteristics those non-extreme events. We hypothesised that concentration occurred under conditions, which are projected become more frequent future. showed dilution patterns nitrate, decreasing by up 41 %, accretion TP, increasing 1400 % Hydroclimatic conditions during were characterised high rainfall intensities low antecedent discharge, but no particular mean discharge. During events, concentration-discharge relationships exhibited primarily clockwise hysteresis, whereas TP displayed an equal mix anticlockwise loops. In contrast, hysteresis weak TP. interpreted these dynamics controls as result infiltration-excess overland flow diluting nitrate-rich groundwater exporting large amounts intensive following droughts, while fluctuations riparian zone streambed remobilization control nutrient exports Given frequency intensity extremes, such retrospective analyses can provide valuable insights into future streams draining
Язык: Английский
Процитировано
7
Water Practice & Technology, Год журнала: 2024, Номер unknown
Опубликована: Март 27, 2024
Abstract Ensuring high water quality in Algeria, particularly Annaba, is crucial for the well-being of its population and sustainable development diverse ecosystems. The study focuses on Cheffia Dam, Oued El Aneb, Treat boreholes as sources drinking water. index (WQI) used to assess based various physico-chemical parameters. research spans from January December 2021, analyzing 16 parameters, such temperature, pH, conductivity, turbidity, total hardness, calcium, magnesium, sodium, potassium, chloride, nitrate, sulfate, phosphate, iron, this results a 36 samples 576 analyses. Principal component analysis (PCA) employed delve into interrelationships between variables, revealing distinct characteristics each site. This study, first kind, provides comprehensive 1-year evaluation Annaba. collected data serve valuable resource future management decisions, highlighting both temporal spatial variations. current indicates that adherence standards, application WQI reveal are generally good throughout year with excellent autumn. However, challenges elevated turbidity dam necessitate targeted interventions.
Язык: Английский
Процитировано
5
Water Research, Год журнала: 2024, Номер 258, С. 121770 - 121770
Опубликована: Май 11, 2024
To improve water quality and reduce instream erosion, floodplain remediation along agricultural streams can provide multiple ecosystem services through biogeochemical fluvial processes. During inundation, longer residence time periodic anoxic conditions lead to increased nitrogen (N) removal denitrification but also mobilization of phosphorus (P), impeding overall improvements. investigate the capacity for N P processing in remediated streams, we measured potential nitrous oxide production yields together with desorption fractions stream sediments ten catchments Sweden. Sediment was as equilibrium concentration, using isotherm incubations. Denitrification rates were acetylene inhibition method. nutrient process combined hydrochemical monitoring their paired upstream control reaches trapezoidal shape determine impact floodplains on quality. The correlation between (r = 0.53, p 0.02) revealed a trade-off soluble reactive (SRP) nitrate removal, driven by connectivity floodplains. Nitrous not affected differences processing, decreased higher desorption. release SRP from (0.03 ± 0.41 mg kg−1 day−1) significantly lower than banks (0.38 0.37 day−1), predicted long-term concentrations inundation frequency. limited. However, showing frequently inundated had labile content coarse soil texture sediments. fully realize improvements constructed promotion should be balanced against risk sediments, particularly high inputs.
Язык: Английский
Процитировано
5