Analysis of future climate variability under CMIP6 scenarios based on a downscaling method considering wet days in the upper Yangtze River basin, China

Theoretical and Applied Climatology, Journal Year: 2025, Volume and Issue: 156(2)

Published: Jan. 13, 2025

Abstract According to recent studies, the past decade was hottest on record, and climate change is accelerating. As part of Yangtze River Basin, largest river basin in China, Upper Basin (UYRB) plays a crucial role as primary source hydropower. However, UYRB also one most climate-sensitive regions within basin, making impact this area particularly critical. We downscaled CMIP6 GCMs’ outputs precipitation (including wet/dry spells sequence correction), temperature projections (2024–2100), under four typical Shared Socioeconomic Pathways (SSPs), we pursued trend analysis upon these potential future series. found significant upward trends across all SSPs August, but no for same month. Additionally, SSP370 SSP585, there are December, while showed during that This may result drier winters than now, increased evapotranspiration, reduced surface (snow) water storage, impacting resources availability. Consecutive dry/wet days at station, scale show spatial-temporal heterogeneity, generally wet longer, dry shorten moving from South-East North-West.

Language: Английский

---

Mapping and assessing impacts of land use land cover and climate conditions on groundwater quality using RS & GIS

Applied Water Science, Journal Year: 2025, Volume and Issue: 15(3)

Published: Feb. 19, 2025

Abstract Groundwater is an essential source for drinking purposes; hence, a qualitative analysis necessary groundwater resources. This study aims to assess the impacts of dynamic land use cover (LULC) and climatic conditions on quality purposes. The investigative research used water index (WQI) analyze identified using LULC map conditions. It extends integrated combined approach different aspects. provides comprehensive understanding how various factors influence quality. total area classified as excellent, good, poor, very unfit consumption based WQI. results concluded that only 10.17% has excellent quality, 19.97% good 9.013% 5.73% have poor respectively, 55% consumption. indicated areas with agricultural expansion, urban development, some natural such topographic features high soil erodibility led dissolved solids, electrical conductivity levels, heavy metals. main lead contamination include expansion development. On other hand, conditions, variations in temperature precipitation, also influenced aids examining perspectives, which will lend hand managers make suitable decisions sustainable development plans conserve economically important region.

Language: Английский

---

Calcium lignosulfonate-induced modification of soil chemical properties improves physiological traits and grain quality of maize (Zea mays) under salinity stress

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: Aug. 20, 2024

Introduction Salinity negatively affects maize productivity. However, calcium lignosulfonate (CLS) could improve soil properties and Methods In this study, we evaluated the effects of CLS application on chemical properties, plant physiology grain quality under salinity stress. Thus, experiment was conducted using three rates, 0 , 5 10 corresponding to 0%, 5%, 10% mass, for irrigation water (WS) levels WS 0.5 2.5 5.5 dS/m, respectively. Results discussion show that × combination increased potassium (K 0.167 g/kg), (Ca, 0.39 g/kg) values while reducing sodium (Na, 0.23 content in soil. treatment decreased K (0.120 Ca (0.15 increasing Na (0.75 The root activity larger than as former enlarged contents latter their values. leaf glutamine synthetase (953.9 µmol/(g.h)) nitrate reductase (40.39 µg/(g.h)) were higher at 573.4 µmol/(g.h) 20.76 µg/(g.h), leading improvement cell progression cycle, revealed by lower malonaldehyde level (6.57 µmol/g). (881, 278 mg/plant), stem (1314, 731 grains (1330, 1117 mg/plant) greater (146, 21 (201, 159 (206, 157 Therefore, more resistance salt stress level, a 7.34% decline yield noticed when surpassed threshold value (5.96 dS/m). protein (13.6 %) starch (89.2 (6.1 (67.0 %), This study reveals addition can alleviate adverse impacts be used an effective amendment irrigating with saline sustainable production.

Language: Английский

---

An Evaluation on the Effect of Water-Saving Renovation on a Large-Scale Irrigation District: A Case Study in the North China Plain

Agronomy, Journal Year: 2024, Volume and Issue: 14(7), P. 1434 - 1434

Published: June 30, 2024

The construction of water-saving renovation projects can bring substantial benefits to the development agriculture, but it may also be accompanied by negative impacts, especially in a large-scale irrigation district. Hence, there is always controversy, and vital necessary investigate effectiveness renovation. In this study, Yahekou district, one largest districts China, selected as case explore beneficial influence adverse impact. Kriging interpolation, Pearson correlation analysis, linear regression analysis are employed study temporal evolution, spatial distribution, domain influencing factors. results show that project district had significant during period 1998–2021, average annual water use decreased 61%. Canal lining an important factor for decrease use, with coefficient −0.538, B −18.669, R2 0.290. Furthermore, not dominant reason changes groundwater depth. Meanwhile, depth below ground level (the DBGL) increased 82%. combined effects atmospheric precipitation, canal lining, river sand mining, exploitation have led sustained increase area. obtained from provide valuable scientific reference agricultural resource management over This article focuses on impact ecological technical indicators such DBGL. However, multifaceted; subsequent research society economy.

Language: Английский

---

Bacterioplankton Community Diversity of a Portuguese Aquifer System (Maciço Calcário Estremenho)

Water, Journal Year: 2024, Volume and Issue: 16(13), P. 1858 - 1858

Published: June 28, 2024

Climate change may increase the vulnerability of aquifers to contamination through extreme precipitation and extended drought periods. Therefore, understanding groundwater ecosystem dynamics is crucial, with bacterial assemblages playing a major role in biogeochemical cycles. The present research describes geospatial study targeting community structure groundwaters from largest karst aquifer Portugal (the Maciço Calcário Estremenho), integrating hydrogeochemical diversity data. A total 22 samples were analyzed set 11 geographically sparsely distributed sources dry vs. wet seasons. 16S rRNA gene barcoding data revealed variability across space time. phylum Proteobacteria was dominant all (from 44 92% sequence reads), mainly represented by classes Alphaproteobacteria (orders Sphingomonadales, BD7–3, Rhizobiales Rhodospirillales), Betaproteobacteria Burkholderiales, Rhodocyclales, Nitrosomonadales), Gammaproteobacteria Pseudomonadales, Xanthomonadales, Alteromonadales, Legionellales) Deltaproteobacteria Myxococcales, Spirobacillales). Variation primarily attributed parameters such as redox conditions (DO, ORP), Fe, Mn, SO4, PO4, Sr Cl, but also some minor trace elements (Al, V, Cr, Cu, Pb). Our results provide novel insights into relation hydrogeochemistry. strong dominance OTUs related taxa associated nitrification/denitrification highlights potentially important these on nutrients (nitrogen sources) quality at this karstic system. Moreover, integration information emphasized central for water monitoring programs.

Language: Английский

---

The research of water supply of drought-resistant varieties of winter soft wheat in the conditions of the Kura-Araz lowland of Azerbaijan

Ekologiya i stroitelstvo, Journal Year: 2024, Volume and Issue: 3, P. 20 - 26

Published: Sept. 25, 2024

It is noted that global climatic changes require optimization of water use in the agricultural sector economy. This necessary for implementation food security conditions. Irrigation crops creates conditions obtaining stable high yields arid Irrigated agriculture largest consumer resources and accounts about 90% all anthropogenic freshwater consumption, occurs on 22% cultivated land provides 40% world production. Climate change also affecting economy Republic Azerbaijan. A special place ensuring occupied by wheat Triticum aestivum L. Therefore, studies varieties suitable cultivation an climate are relevant. The purpose study was to development phases domestic foreign winter soft under various irrigation regimes. data increase yield different depending rate.

Language: Английский

---