« Home « Kết quả tìm kiếm

Water bodies

Tìm thấy 20+ kết quả cho từ khóa "Water bodies"

Permanent Water Bodies Mapping in the Mekong River Delta Using Seasonal Time Series C-band SAR Data

1.pdf

repository.vnu.edu.vn

Illustration of the water body mapping algorithm. The water and the non-water regions in the feature space of the TV and MiB are masked according to red line.. Map of permanent water bodies in Mekong River Delta.. Assessment of permanent water body mapping accuracy.

Pollution and health risks assessment of nitrate and phosphate concentrations in water bodies in South Eastern, Nigeria

tailieu.vn

Pollution and health risks assessment of nitrate and phosphate concentrations in water bodies in South Eastern, Nigeria. In this study, nitrate and phosphate concentrations in water- bodies such as Abadaba river, Agulu lake, Njaba river, Oguta Lake, and Nike Lake located in Southeast, Nigeria was determined in both dry and wet season by spectrophotometric technique and modeled for pollution and health risks assessment.

Determination of trophic weight and indicator values of diatoms in Turkish running waters for water quality assessment

tailieu.vn

Evaluating the ecological status of water bodies based on physical and chemical variables of the ecosystems is one of the relevant approaches in water quality assessment. The use of physical and chemical properties of water to assess water quality gives a good impression of the status, productivity, and sustainability of a water body (Mustapha, 2008)..

Conditions of the surface water and ground water resources in the rural area of the Mekong Delta, Vietnam

tailieu.vn

Besides those anthropogenic impacts on the water resources also climatic and geogenic factors play an important role: severe floodings occur during the end of the rainy season (N GUYEN V IET P HO , 2000), surface water bodies are polluted by acid sulphate soils (L E Q UANG M INH , 1996), saltwater intrudes into the surface and ground water bodies from the sea (SIWRMP, 1995. Also ground water is often polluted by high chloride or iron concentrations (D O T IEN H UNG ET AL.

Water environmental governance in the Mekong delta, Vietnam

tailieu.vn

Historically for practical reasons the population has settled down densely along the stream banks, resulting in a high concentration of human pollutants along the water bodies in the Delta..

PhD’s thesis summary: Research on biogas production from rice straw and water hyacinth

tailieu.vn

Therefore, it is necessary to do the research on using water hyacinth for biogas production.. 3.2 The growth of water hyacinth in different water bodies. Figure 3.1: The growth rate of water hyacinth in four water bodies. The result indicated the average growth of water hyacinth increase 19.1g.m. Biogas yield of water hyacinth ranged from 200-300 L.kgVS -1 (O'Sullivan et al., 2010.

Solutions to reduce water pollution at metal craft village of Thanh Thuy commune, Thanh Oai district, Hanoi city

tailieu.vn

Water environment pollution in Thanh Thuy commune. With the current management and treatment of wastewater in the locality, it has greatly affected the quality of the water bodies. To assess the level of water pollution in the study area, groundwater and surface water samples were taken for analysis and evaluation.. Current situation of surface water pollution. The analysis results of surface water samples in Thanh Thuy commune are shown in table 5..

Water quality management for irrigation in the mekong river delta, Vietnam

tailieu.vn

The population of the MD has doubled over the past 30 years and is estimated to grow by another 30 to 50 per cent by the year 2025 (Mekong River Commission - MRC, 2004). population has settled densely on the along the river and canal banks, resulting a high concentration of human pollutants along the water bodies in the Delta.. The long-term average annual rainfall in the MD varies from mm (Figure 2).

Challenges of water resources management for downstream livelihood of the lower Mekong delta, VietNam

tailieu.vn

The Lower Mekong River Delta (MD), in Vietnam, covers nearly 4 millions hectares and currently supports more than 17 million people living along main rivers and canals and other water bodies. Any change in upstream of the Mekong River effects sensitively to the livelihood of people in downstream.. A survey on challenges to which downstream grass-level people faces for their water resources management was taken in a downstream district of Tien Giang province.

Rotifera of various aquatic environments of Costa Rica in reference to Central American rotifer fauna

tailieu.vn

A thorough examination of various water bodies in Costa Rica could even bring over 70 new rotifer species. These may soon be identified as the first data from a large survey of rotifers in small water bodies of Costa Rica has lately been published (Gálvez et al., 2018).

An overview of the drinking water supply situation in the Mekong river delta, Vietnam

tailieu.vn

Moreover, sustained development of the MD is threatened by large scale destruction of mangroves for shrimp cultivation that leads to the pollution of the estuarine water bodies and in the future possible by overexploitation and un-calculation of groundwater aquifer.. Even minor changes to local water management technologies may have unexpected and far-search impact on the hydrological environments of the neighboring locations..

Taxonomic investigation of euplanktonic diatom communities as indicator of copper in the bank of the Subarnarekha river, Ghatshila, Jharkhand, India

tailieu.vn

Four types of abundance categories have been proposed in the present study: (i) most dominant, (ii) dominant, (iii) less dominant and (iv) absent, on the basis of the contaminated sites. mineralization and eutrophic condition of the water bodies. High nitrate and sulphate values indicate the eutrophic condition of the water bodies of the sampling sites either due to anthropogenic activities or industrial pollution (Bella et al., 2007).

Toxicity of Surface Water Contamianted with Arthropogenic Pollutants to Micro-Crustacean, Daphnia magna

4.pdf

repository.vnu.edu.vn

The alterations of Daphnia in water bodies are regulated by the aquatic multi-factors.. Previously, negative effects of single purified xenobiotics (e.g. Cu, Cr) on micro-crustaceans were widely investigated [4- 6] in which the toxins caused strong reduction of survivorship, altered the maturation and inhibited fecundity of the animals. magna to treated and untreated domestic wastewater were reported including mortality increase, reproduction decrease and malformation of the off spring [7].

Bài tập trắc nghiệm Tiếng Anh lớp 8 Unit 7: Pollution có đáp án

tailieu.com

One main cause of this issue is waste water coming from many factories and then being directly pulled out into water bodies, especially into rivers or seas without any treatment because this is the most convenient way of disposing waste water. Another cause is the awareness of citizens, people always use water for many purposes and then they dump waste water or garbage directly into rivers, canals and ponds and so on. Question 11: How many causes of water pollutions are listed in the passage?.

Bioassessing ecological status of surface waters in the Araban-Yavuzeli catchment (Turkey): Application of diatom indices

tailieu.vn

The trophic index (TI) (Rott et al., 1999) was used to assess the ecological quality of water bodies using the. Sampled water bodies in the Araban-Yavuzeli catchment generally had slightly alkaline water (pH range Table 2).. Nutrient concentrations changed substantially in the sampling sites during the present study period. Ardıl Creek1 had lower nutrient values (e.g., 26.63 µg/L P-PO 4 and 0.01 mg/L N-NO 2 ) than those of other sampling stations in the Araban-Yavuzeli catchment.

A machine learning approach to monitoring and forecasting spatio-temporal dynamics of land cover in Cox’s Bazar district, Bangladesh from 2001 to 2019

tailieu.vn

The detailed findings of the study are discussed below,. 15 - Permanent Snow and Ice: at least 60% of the area is covered by snow and ice for at least 10months of the year. 5 (k) Water Bodies: at least 60% of the area is covered by permanent water bodies . Several landmasses, narrowly sepa- rated from the mainland by water, are also visible at the top of the ROI.. However, bare lands are concentrated at the top of the ROI.

AQUACULTURE & FISHERIES IN THE MEKONG DELTA - VIET NAM

tailieu.vn

Major water bodies can be utilized for Major water bodies can be utilized for inland capture fisheries &. inland capture fisheries &. aquaculture aquaculture. Inland Capture Fisheries Inland Capture Fisheries. Inland Capture Fisheries (2) Inland Capture Fisheries (2). Inland Aquaculture Aquaculture. Utilization of River Water for Aquaculture Aquaculture (1) (1). Stocking density: 70-150 fingerling/m 3. Feeds: home-made feeds &. Number of crops: one per year.

Does the location of coastal brackish waters determine diversity and abundance of zooplankton assemblages?

tailieu.vn

The differences in location in the investigated water bodies impacted zooplankton assemblage structure and abundance. The structure and abundance of zooplankton may also be an indicator of changes in the environmental conditions in a water body (Karabin, 1985a, 1985b).

Spatial distribution and ecology of soil parasites and Schistosoma haematobium infection in Eggua, Nigeria

tailieu.vn

Most times the snail intermediate host harbours very low levels of infection, which makes it difficult to estimate the degree to which freshwater bodies are contaminated with schistosome ova (Rabone et al., 2019).. The high rate of open defaecation in these communities (Anumudu et al., 2019) facilitates the high transmission of STH and S. haematobium in the area. Open water bodies are particularly considered for open defaecation and urination in rural areas (Grimes et al., 2015).

Landfill site selection using GIS based multi criteria evaluation technique. A case study of Srinagar city, India

tailieu.vn

Hauling analysis is performed by taking the summation of the length of trips from all solid waste collection points to a particular potential site. 1 Distance from Residential area (m . 2 Distance from Built-up area (m . 5 Distance from Water bodies (m . 7 Distance from Agricultural area (m . Distance from Built-up area . Distance from Railway Line . Distance from Water bodies . Distance from Airport .