Surface waters

Research on wastewater treatment using constructed wetlands has shown that increasing the water retention time improves water treatment efficiency. Constructed wetlands are used for many purposes: polishing conventionally treated wastewater, holding and treating storm water, treating industrial or agricultural wastewater, and treating acid mine drainage and landfill leachates.

9p vithomson 02-07-2024 0 0   Download

Part 1 book "Geotechnical engineering - Principles and practices of soil mechanics and foundation engineering" includes content: Introduction, soil formation and characterization, soil phase relationships, index properties and classification, soil permeability and seepage, effective stress and pore water pressure, stress distribution in soils due to surface loads, compressibility and consolidation, shear strength of soil, soil exploration, stability of slopes, lateral earth pressure.

499p dianmotminh04 12-07-2024 0 0   Download

Part 1 of ebook "Geographic information systems in water resources engineering" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Introduction to geographic information systems; Chapter 3 - GIS data and databases; Chapter 4 - GIS analysis functions and operations; Chapter 5 - GIS for surface-water hydrology; Chapter 6 - GIS for groundwater hydrology;...

152p mothoiphong 28-06-2024 1 1   Download

Part 2 of ebook "Soil and water contamination from molecular to catchment scale" provides readers with contents including: transport processes of substances in soil and water; substance transport; sediment transport and deposition; chemical transformation; model calibration and validation; patterns of substances in soil and water; atterns in groundwater; patterns in surface water;...

219p mothoiphong 28-06-2024 1 1   Download

The presence of ammonium in drinking water poses a significant global challenge, demanding strategies that safeguard both public health and the environment. This study investigates the adsorption potential of AC-GCB biochar, obtained by pyrolyzing green coffee extracted bioactive compounds at 400ºC, for ammonium removal from groundwater.

11p viamancio 04-06-2024 2 0   Download

Part 2 of ebook "Building services engineering (Fifth edition)" provides readers with contents including: Chapter 7 - Soil and waste systems; Chapter 8 - Surface-water drainage; Chapter 9 - Below-ground drainage; Chapter 10 - Condensation in buildings; Chapter 11 - Lighting; Chapter 12 - Gas; Chapter 13 - Electrical installations; Chapter 14 - Room acoustics;...

223p giangdongdinh 28-05-2024 3 3   Download

Ebook "Soil degradation, conservation and remediation" covers the extent, causes, processes and impacts of global soil degradation, and processes for improvement of degraded soils. Soil conservation measures, including soil amendments, decompaction, mulching, cover cropping, crop rotation, green manuring, contour farming, strip cropping, alley cropping, surface roughening, windbreaks, terracing, sloping agricultural land technology (SALT), dune stabilization, etc., are discussed.

248p giangdongdinh 28-05-2024 0 0   Download

Ebook "Experiences from surface water quality monitoring: The EU water framework directive implementation in the Catalan river basin district (Part I)" details the experiences gained by the Catalan Water Agency (ACA) in a Mediterranean watershed – the Catalan River Basin District – following the launch of the EU Water Framework Directive (WFD) in the year 2000. Experts in rivers, reservoirs, lakes, wetlands and estuaries present 13 chapters defining tools for water-status assessment specially adapted to Mediterranean conditions.

337p giangdongdinh 28-05-2024 2 0   Download

This study presents some research results on the relationship between the geological environment of the surface layer and the level of modern tectonic activity in the sea waters of the Hoi An - Cua Dai area based on the interpretation of high-resolution shallow seismic data combined with the surface sediments’ grainsize analysis and other available data sources. The results show that the surface geological environment in the coastal waters North of the Thu Bon river fault is influenced by modern tectonic activities, believed to be a part of causing geological catastrophic events.

10p dianmotminh02 03-05-2024 3 1   Download

This has increased the risk of water pollution and reduced the quality of surface water, resulting in a shortage of clean water for the daily lives of people in the province. The article has studied the application of the MIKE11-ECOLab model and correlation analysis method to assess the current situation of the wastewater receiving capacity of the central river system in Nam Dinh province. At the same time, it also analyzes and predicts the wastewater receiving capacity of the central river system in the province according to the trend of socio-economic development.

9p dianmotminh02 03-05-2024 3 1   Download

In this study, we present the experimental evidence demonstrating the utility of electrical double layer (EDL)-induced ion accumulation, using sodium (Na+) ion in water as a model substance, on a negatively charged nanostructured surface, specifically thermally grown silicon dioxide (SiO2). This novel approach, termed Ion Surface Accumulation (ISA), aims to enhance the performance of nanostructured porous silicon (PSi) interferometers in optical refractometric applications.

11p dianmotminh02 03-05-2024 7 1   Download

Estuary sediments contain toxic heavy metals which can pollute coastal wetlands. Ba Che river estuary is a coastal wetland with an area of 2,844 ha, which is affected by wastes in Ba Che river water and aquacultures. In this study, the accumulation of heavy metals in the Ba Che river estuary was assessed based on the enrichment factor (EF), the geo-accumulation index (Igeo), and the ecological risk index (RI).

9p dianmotminh02 03-05-2024 6 1   Download

In porous aquifers, the central-to-sea cross-section highlights meteoric water dominance from rain and surface sources. Groundwater undergoes exchange-absorption with silicate minerals, enriching Ca2+ and Mg2+ (reducing Na+). Seaward, dissolution and leaching of salts in marine-origin sediments (mQ2, mQ13, mQ12-3, and mN22) prevail. The results of this paper provide necessary information for the effective management of groundwater quality.

12p dianmotminh02 03-05-2024 2 1   Download

In this paper, a thin stearic acid (SA) film was deposited onto the polyurethane (PU) coatings with different concentrations of stearic acid in the ethanol (1 wt.%, 2 wt.% and 3 wt.%) by centrifuged technique. Fourier transform infrared spectra (FTIR) and water contact angle (WCA) method were performed to characterize and evaluate the hydrophobic layer formed on the surface of the samples.

9p dianmotminh02 03-05-2024 3 2   Download

Capacitive Deionization (CDI) has emerged as a promising and environmentally sound solution for addressing pressing water treatment challenges. This critical review meticulously examines the design, operational considerations, and performance metrics of CDI systems, particularly highlighting their significance in environmental applications under real-world conditions for handling different water sources such as groundwater, surface water, sea water.

22p viohoyo 25-04-2024 4 2   Download

This study applied principal components analysis (PCA) and cluster analysis (CA) to assess water quality and recommend sites and water parameters for water quality monitoring at Bung Binh Thien reservoir, An Giang province, Vietnam based on 11 water samples collected in the dry season.

10p viohoyo 25-04-2024 3 2   Download

In this study, we simulate submarine landslide using the one-dimensional conservative form of the nonlinear shallow water equations (NSWE) in (b s,) coordinate. Where b and s are the elevations of debris bottom and surface, respectively.

7p viohoyo 25-04-2024 5 2   Download

Bac Ninh is a province with a dense network of windows from 1.0 -1.2 km/km2 with large river systems flowing through Duong River, Cau River, Thai Binh River and the downstream part of Ca Lo River. With a dense river system and abundant surface water saving, the province’s irrigation plays a particularly important role in water harvesting, drainage and flood prevention in the province. Over the years, the province has focused resources to invest in the development of irrigation infrastructure.

13p longtimenosee09 08-04-2024 5 0   Download

This study aims to investigate the characteristics of the salinization phenomenon in water systems and its controlling factors based on hydrogeochemical analysis, seawater-freshwater mixing model and End Members Mixing Analysis. The results revealed that seawater intrusion negatively affects strongly on surface water quality with different magnitudes, depending on seasonal variation and tidal regime.

11p vijaychest 24-04-2024 2 2   Download

The purpose of the study "Monitoring surface water bodies changes from sentinel-2A imagery with modified normalized difference water index: Application in Dalat, Lam Dong, Viet Nam" is to identify surface water body changes using Sentinel-2 MSI (Multi-Spectral Instrument) data, one of the latest types of remote sensing satellite data. The results of the research show that by using Sentinel-2 MSI imagery, MNDWI (Modified Normalized Water Index) is the appropriate parameter to detect surface water areas in the studied area, with an overall accuracy > 0.92 and Kappa coefficient > 0.84.

10p tukhauquantuong1011 22-04-2024 4 2   Download