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basins, etc ; calcium oxide; catenas; provenance; China; Show all 5 Subjects
Abstract:
... Northern China has 12 main deserts that range from extremely arid regions in the west to semi-arid or semi-humid regions in the east. Based on their geographical locations, we divided these deserts into western, central, and eastern deserts. We investigated the geochemical elements in their surface sediments and found that the concentration of the major element SiO₂ gradually increased from west t ...
basins, etc ; altitude; case studies; models; rain; snow; snowmelt; soil water; spring; summer; temperature; Show all 11 Subjects
Abstract:
... Shallow landslides (SLs) are rapid soil mass movements, typically occurring in the mountain areas, involving the most superficial soil layers up to 5 to 10 m in depth. Damages, and casualties due to shallow landslides are recorded globally, and in literature a variety of models to study landslides have been implemented hitherto. Often times, shallow landslides occur in the wake of snowfall events, ...
basins, etc ; El Nino; atmospheric precipitation; drought; environment; people; runoff; soil water; watersheds; Mekong River; Show all 10 Subjects
Abstract:
... Drought may lead to severe and diverse impacts on agriculture, economy, and society across different regions and periods, posing predictive and adaptive challenges. In recent years, severe droughts have affected >60 million people in the Mekong River Basin (MRB). Additionally, El Niño Southern Oscillation (ENSO) episodes had distinct influences on the occurrence and intensity of drought variabilit ...
basins, etc ; aerosols; autumn; biomass; cities; coal; combustion; nitrates; organic carbon; particulate emissions; pollution; risk; steel; sulfates; water content; winter; China; Show all 17 Subjects
Abstract:
... Nowadays, the fine particle pollution is still severe in some megacities of China, especially in the Sichuan Basin, southwestern China. In order to understand the causes, sources, and impacts of fine particles, we collected PM₂.₅ samples and analyzed their chemical composition in typical months from July 2018 to May 2019 at an urban and a suburban (background) site of Chengdu, a megacity in this r ...
basins, etc ; climate change; corn; crop yield; drought; environment; food security; models; runoff; soil water; time series analysis; Brazil; Central America; France; Mexico; Southern Africa; Show all 16 Subjects
Abstract:
... Droughts are one of the most devastating natural disasters. Droughts can co-exist in different forms (e.g. meteorological, hydrological, and agricultural) as concurrent droughts. Such concurrent droughts can have far reaching implications for crop yield and global food security. The present study aims to assess global concurrent drought traits and their effects on maize yield under climate change. ...
... Even though the monophyletic status of Achiridae has been supported by morphological and molecular data, the interrelationships within the representatives of this family are poorly resolved. In the present study, we carried out the most complete molecular phylogenetic analysis of this group, encompassing all genera and employing both nuclear (Rhodopsin, Recombination activator [Rag 1], Mixed – lin ...
basins, etc ; Labeo victorianus; aquaculture; condition factor; detritus; diet; fish; food composition; humans; omnivores; ontogeny; organic matter; periphyton; rivers; sand; temporal variation; threatened species; turbidity; water quality; Kenya; Lake Victoria; Show all 21 Subjects
Abstract:
... Labeo victorianus (Boulenger, 1901) is one of the endemic fishes in Lake Victoria Basin (LVB) but is now threatened by multiple stressors caused by human activities. We investigated spatial and temporal variability in food composition and condition of L. victorianus in influent rivers of Lake Victoria, Kenya. Sampling was done during the dry and wet seasons by electrofishing. Food composition anal ...
... Rifted passive margins exhibit a large variety in the timing, distribution, and amount of magmatism. The factors controlling magmatism during rifted margin formation, remain, however, incompletely understood, partly owing to the complex rifting styles. In this study, we use 2‐Dimensional numerical models to investigate the effects of depth‐dependent wide rifting and lithospheric counterflow on mag ...
... This study presents an extension of an existing performance-based weighting system to combine statistical streamflow estimates for ungauged basins. Three statistical methods, namely the drainage area ratio (DAR) method, the standardization with mean (SM) method, and the inverse similarity weighting (ISW) method, have been applied to two sub-basins of the Euphrates basin in Turkey. To improve the e ...
... In this study accuracy of the ANFIS and ANFIS-PSO models to estimate hydraulic jump characteristics including sequence depth ratio, the jump length, the roller length ratio, and relative energy loss was evaluated in stilling basin versus laboratory results. The mentioned characteristics were measured in the stilling basin with a rectangular cross-section with four different adverse slopes, four di ...
... Natural disasters, including droughts and floods, have caused huge losses to mankind. Hydrological modelling is an indispensable tool for obtaining a better understanding of hydrological processes. The DEM-based routing methods, which are widely used in the distributed hydrological models, are sensitive to both the DEM resolution and the computational cell size. Too little work has been devoted to ...
... Large fault belts often influence the paleo-geomorphic changes in basins and control hydrocarbon accumulation and distribution in basins. Based on the gravity field model European Improved Gravity model of the Earth via New techniques (EIGEN)-6C4, this study calculated the residual Bouguer gravity disturbance of the Tarim Basin by using the minimum curvature method and analyzed gravitational chara ...
... Study Region Poland (representative sample of 146 flow gauges free of major human modifications, located in 12 major river basins) Study Focus The objective was to present trends in selected river flood indicators (magnitude, frequency and timing) in Poland, using the annual maximum daily flow and peak-overthreshold approaches. Two periods (1956–2019 and 1981–2019) were analyzed. The first period ...
... The Indus Basin is one of the most vulnerable regions due to climate change. This article presents the mean precipitation and temperature changes along with their extremes over the Indus Basin (IB). Here we used the statistically downscaled, bias-corrected, high-resolution data from the newly emerged Coupled Model Intercomparison Project Phase 6 (CMIP6) of two Shared Socioeconomic Pathways (SSP2-4 ...
... To clarify the main factors that control deep carbonate rock gas reservoirs in the Jiulong Mountain area, China, reservoir fractures and caves were investigated. This study revealed, for the first time, that fault-dissolved body traps have formed in the Maokou Formation, Sichuan Basin, and that the identification of fault-dissolved bodies is key in the exploration process. In this study, high-prec ...
basins, etc ; climate; governance; research coordination; Show all 4 Subjects
Abstract:
... Climate-driven disturbances threaten the sustainability of coastal communities in the Great Lakes Basin. Because such disturbances are unpredictable, their magnitude, number and intensity are changing, and they occur at varying temporal and spatial scales. Consequently, communities struggle to respond in effective ways. The expected intensification of climate-driven disturbances will require that ...
... The preservation of the sedimentary deposits of arid environments is determined by both geomorphic and geologic processes. Sedimentary evidence of aeolian-fluvial system interactions in arid-climate settings are preserved in both recent and ancient sedimentary successions. However, despite considerable prior sedimentological research, there is no unifying scheme to provide generalized definitions ...
basins, etc ; mineralization; tectonics; topography; Nigeria; Show all 5 Subjects
Abstract:
... Tectonic structures controlling mineralization in some parts of Southeast Nigeria were evaluated using airborne potential field data. High- and low-frequency filters and depth determination tools were adopted to evaluate short- and long-wavelength anomalies, resolve the spatial spreading of igneous intrusions, depths to geologic sources and basin topography. The high-frequency results exhibited hi ...
... With the economic expansion and population growth, water basins have encountered environmental issues, and water basin protection and sustainability have achieved more importance. This study aimed to provide a method to develop sustainable plans for water resources. Thus, it needs to determine the sustainability criteria of a water basin plan and then rank them in terms of their role in the basin ...
... Economic development projects in river basins, involving mining, forestry, agriculture and urban developments, invariably impact the aquatic ecosystems of the basin [...] ...