Báo cáo " Characteristics of Quaternary sedimentary facies in relation to water bearing capacity of aquifers and aquicludes in the Red River Delta, Vietnam " ppt
Báo cáo " Characteristics of Quaternary sedimentary facies in relation to water bearing capacity of aquifers and aquicludes in the Red River Delta, Vietnam " ppt
... VNUJournal of Science,EarthSciences23(2007)170‐176170 Characteristics of Quaternary sedimentary facies in relation to water bearing capacity of aquifers and aquicludes in the Red River Delta, Vietnam NguyenThanhLan*,TranNghi,DangMai,DinhXuanThanhCollege of Science,VNUReceived07March2007Abstract.There ... m.However,due to the action of old river systems, in someplacesthereisnotrace of the finegrainsediments, but there remain only the coarsegrainedsediments of river bed facies, whichare of high storage and water bearing capacity. These ... plain river bed facies and chan gin g up war ds into finersediments co nsisting mainly silty clay mixedwith fine sand of flood plain facies and clay of lagoonal facies. ‐...
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Báo cáo " Quantitative distribution of groundwater chemical components in the Red River Delta based on frequency analysis " pot
... averagethickness of about 13.6 m, while the depth to the top and to the bottom of groundwatertablevariesfrom5m to 10m and from15m to 20mrespectively[4].Chemical compositions and some characteristics ... widely in RRD. It composes of twolayers characterized by a fine grain size and coarsegrainsize[4,5].Finesedimentscompos edmainly of sand in the lowerpart and weatheredclay ... Hence, the median and the percentile of 85%shouldreplace the mean and the standard deviation that iscalculatedaccording to Equation(2). In thiscase, the median and standarddeviationequal63mg/l and ...
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Children security as part of the " living together with floods" strategy in the Mekong river delta, VietNam
... rice fields and flood plains. Some of them learn to swim at early age, but others were not trained. There is no official swimming training in the school program in the Mekong River Delta. ... deaths of children from drowning. In peak flow periods, all children (over 160,000) in the high inundated areas are not attending their schools. The beginning and the end of the rainy season ... soils, eliminating rats and insects, provision of fresh water, refilling of groundwater, and protection of forest and provision of ecosystem services. The 2nd Vietnam National Strategy and Action...
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Tài liệu Action plan for the multi-level conservation of forest wetlands in the Mekong River Delta, Vietnam pdf
... Fig.1: The Mekong River Basin and Land forms of the MD in Vietnam The main objective of this article is the presentation of the forest wetland inventory process, applied to both the inland and ... to October, most of the MD receives between 1800 and 2200 mm of rainfall. At the end of the rainy season, due to the combination of floodwater draining from the upstream areas, the overland ... forest in the Upper and the Lower U Minh areas were burned, accounting for approximately 57% (17% in the Lower U Minh and 40% in the Upper U Minh) of the total Melaleuca forest area. In the U Minh...
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Tài liệu An overview of the drinking water supply situation in the Mekong river delta, Vietnam pdf
... overview of the drinking water supply situation 1 in the Mekong river delta, Vietnam (Le Anh Tuan) AN OVERVIEW OF THE DRINKING WATER SUPPLY SITUATION IN THE MEKONG RIVER DELTA, VIETNAM ... collecting, storing and treating the water for domestic use. • Rain water: is used as one of favorite drinking water sources, special in the rural and suburban areas. In the urban places, rain water ... 75% of the inhabitants in the urban and 35% in the suburban and rural have access to clean water, this figure drops to 20% in far and deep areas. Since last 20 years to now, many drinking water...
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Tài liệu Water quality management for irrigation in the mekong river delta, Vietnam doc
... in Vietnam. The Delta in Vietnam is bordered to the North by Cambodia, to the west by the Vam Co river, to the south by the Eastern Sea and to the west by the Gulf of Thailand. The whole Delta ... the river branches is very complicated. The main factors are river discharge, local rainfall and runoff, the amplitude of tides in the East Sea and the Gulf of Thailand, the slope of the river ... Fig.1: The Mekong River Basin and Land forms of the MD in Vietnam 3 and in a part of Ca Mau peninsula. This soil is very sensitive to the fluctuations in the river discharge and groundwater...
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Tài liệu Sustainable water management for rural development in the Mekong river delta, Vietnam pptx
... around 85% of the total water supply. Approximately 2 million tons of rice, produced in the MD, are yearly exported from Vietnam to the rest of the world. The rapid expansion of intensified ... to irrigate nearly 1,5 million hectares of cultivable lands in the dry season. The shortage of freshwater leads to increasing salinity intrusion throughout the MD coastal provinces. (v) The ... are to bring alluviums for the fields, to flush polluted water, crop insects to the sea and to supply fishes for the people. All the socio-economic activities in the MD highly depend on the water...
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Arsenic pollution in groundwater in the red river delta
... methods to mitigate arsenic in groundwater. - Investigation into the degree of arsenic pollution and the scale of distribution of arsenic in the vulnerable areas in the Red River Delta plain and ... lowering of the water table and the enlarging of the cone of depression. The observed data show that cones of depression have formed in Hanoi, in Vinh Yen, in Hai Phong, in Nam Dinh and in Thai ... and in mapping and surveying for minerals in Vietnam in general and in the Red River Delta plain in particular. Arsenic is detected in mining areas, ore outcrops and in areas where industrial...
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Báo cáo " Reconstructing sedimentary environments of MR1 core and investigating facies’ geotechnical properties through the piezocone penetration test in the Late Pleistocene-Holocene periods in the Mekong River Delta " docx
... fs and u2 as a function of depth. The change in the amplitude of the saw-tooth depends on the arrangement of the soil layers and the mixed levels of sand, silt and clay soils. If the thickness ... of floodwater, causing overland flows along the banks and interior fields. Flood basins are low-lying areas and received these sedimentary materials. The flood basins of the Mekong River system ... 150kPa, and 90 to 1500kPa, respectively. These are also the same as those of the estuarine marine facies, but qt, fs, and u2 are lower than and in range of 1000 to 5000kPa, 15 to 70kPa, and...
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Báo cáo " Quaternary sedimentary cycles in relation to sea level change in Vietnam " pdf
... Red River Delta, Cuu Long River Delta, Centralplain in Quaternary Red River Delta(RRD) and CuuLong River Delta(CLRD)are the biggestplains in Vietnam. Developing history and sedimentary ... eoliansediment in sandybars and sandydunes in CLRD.4.Thermoluminescenceage of red sandycycles in PhanThiet‐BinhThuanprovinces The coastline of SouthCentral Vietnam isdominated ... Pleistocene (Vinh Phuc Formation in RRD and Cu Chi or Moc Hoa in CLRD), whichcontains coarse and medium grained sands of river bed facies and passingupwardsintosandlevee...
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