Pub Date : 2020-12-31DOI: 10.31276/vjste.62(4).77-86
N. Trang, S. Shrestha, H. Ishidaira, Pham Thi Thao Nhi
As emphasised in the IPCC Fifth Assessment Report (AR5), climate change is occurring across nearly all the regions of the world [1]. Climate change can considerably affect the regional hydrology and water resources through changes in hydrological processes, especially in evapotranspiration, soil water, and surface runoff. Furthermore, climate change may include an increased frequency and magnitude of hydro-meteorological extremes, namely droughts and floods [2]. Such hydrological changes will lead to the redistribution of water resources that impact water supply, hydropower, and irrigation on multiple scales. Therefore, discovering ways that water resource systems can be impacted and their respond to climate change scenarios has been the research topic of interest of the IPCC and many other international organizations and research institutions.
{"title":"Evaluating the impacts of climate change on the hydrologyand water resource availability in the 3S river basin of Cambodia, Laos, and Vietnam","authors":"N. Trang, S. Shrestha, H. Ishidaira, Pham Thi Thao Nhi","doi":"10.31276/vjste.62(4).77-86","DOIUrl":"https://doi.org/10.31276/vjste.62(4).77-86","url":null,"abstract":"As emphasised in the IPCC Fifth Assessment Report (AR5), climate change is occurring across nearly all the regions of the world [1]. Climate change can considerably affect the regional hydrology and water resources through changes in hydrological processes, especially in evapotranspiration, soil water, and surface runoff. Furthermore, climate change may include an increased frequency and magnitude of hydro-meteorological extremes, namely droughts and floods [2]. Such hydrological changes will lead to the redistribution of water resources that impact water supply, hydropower, and irrigation on multiple scales. Therefore, discovering ways that water resource systems can be impacted and their respond to climate change scenarios has been the research topic of interest of the IPCC and many other international organizations and research institutions.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81031460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-31DOI: 10.31276/vjste.62(4).71-76
N. Anh, Ngoc H. Bui
: According to Decision No. 711/QD-TCMT of the Ministry of Natural Resources and Environment, the water quality index (WQI) formula has been adjusted toward localisation, particularly, for the Nhue Day and Cau river basins. In this work, the WQI formula was amended by adjusting the weights of the components of surface water quality. This is an advance forward toward enhancing the effectiveness of local environmental management so that local economic development conditions are shaped according to its own potential and in accordance with the natural characteristics and culture of the regions. Based on surface water quality data from 2012 to 2019 in Tien Giang and the theory of fuzzy entropy weighting to identify component weights, this study adjusted the WQI formula in accordance with natural conditions as well as special characteristics of the socio-economic development of Tien Giang. Finally, a zoning map of surface water quality in the province was set up.
{"title":"The zoning of surface water quality by WQI index in the Tien Giang province, Vietnam","authors":"N. Anh, Ngoc H. Bui","doi":"10.31276/vjste.62(4).71-76","DOIUrl":"https://doi.org/10.31276/vjste.62(4).71-76","url":null,"abstract":": According to Decision No. 711/QD-TCMT of the Ministry of Natural Resources and Environment, the water quality index (WQI) formula has been adjusted toward localisation, particularly, for the Nhue Day and Cau river basins. In this work, the WQI formula was amended by adjusting the weights of the components of surface water quality. This is an advance forward toward enhancing the effectiveness of local environmental management so that local economic development conditions are shaped according to its own potential and in accordance with the natural characteristics and culture of the regions. Based on surface water quality data from 2012 to 2019 in Tien Giang and the theory of fuzzy entropy weighting to identify component weights, this study adjusted the WQI formula in accordance with natural conditions as well as special characteristics of the socio-economic development of Tien Giang. Finally, a zoning map of surface water quality in the province was set up.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76553349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-31DOI: 10.31276/vjste.62(4).87-94
T. Duy, Duongthi Thuy Nga
{"title":"Application of remote sensing in evaluating the PM10 concentration in Ho Chi Minh city","authors":"T. Duy, Duongthi Thuy Nga","doi":"10.31276/vjste.62(4).87-94","DOIUrl":"https://doi.org/10.31276/vjste.62(4).87-94","url":null,"abstract":"","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89448776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-31DOI: 10.31276/vjste.62(4).43-48
T. Tran, T. Tran, X. Ngô, T. Pham
: Benthic algal assemblages are considered effective indicators of environmental change because they sensitively respond to a variety of environmental conditions. This study aims to investigate the relationship between the benthic algal community and nutrient variables in sediment using Spearman’s correlation and linear regression analysis. A total of 27 genera of benthic algae were recorded during the study period where cyanobacteria and diatom were the two dominant groups. Several species belonging to Achnanthidium, Luticola, Lyngbya, Navicula , and Phormidium sensitively responded to nutrient levels and were used as bioindicators . Multiple stepwise linear regression revealed that ammonium (NH 4+ ) and total nitrogen (TN) positively correlated with several indices of the benthic algae assemblage. This preliminary data set demonstrates the use of benthic algae as precise biological indicators for a measure of the ecological integrity of an aquatic ecosystem and contributes to the further study of benthic environments in tropical regions.
{"title":"Nutrients in sediment regulate benthic algal assemblages in the tropical Tri An reservoir of Vietnam","authors":"T. Tran, T. Tran, X. Ngô, T. Pham","doi":"10.31276/vjste.62(4).43-48","DOIUrl":"https://doi.org/10.31276/vjste.62(4).43-48","url":null,"abstract":": Benthic algal assemblages are considered effective indicators of environmental change because they sensitively respond to a variety of environmental conditions. This study aims to investigate the relationship between the benthic algal community and nutrient variables in sediment using Spearman’s correlation and linear regression analysis. A total of 27 genera of benthic algae were recorded during the study period where cyanobacteria and diatom were the two dominant groups. Several species belonging to Achnanthidium, Luticola, Lyngbya, Navicula , and Phormidium sensitively responded to nutrient levels and were used as bioindicators . Multiple stepwise linear regression revealed that ammonium (NH 4+ ) and total nitrogen (TN) positively correlated with several indices of the benthic algae assemblage. This preliminary data set demonstrates the use of benthic algae as precise biological indicators for a measure of the ecological integrity of an aquatic ecosystem and contributes to the further study of benthic environments in tropical regions.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84654465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-30DOI: 10.31276/VJSTE.62(3).70-75
Vũ Xuân Tạo, Trần Bảo Trâm, N. Hien, T. H. Dung, T. Tuan
: Vietnam possesses an abundant and highly diverse resource of plants. Therefore, the search and evaluation of bioactive compounds extracted from these plants are a potential research direction to support developing products that improve human health. The purpose of this study is to assess the antifungal activity of some essential oils produced by materials harvested in Vietnam such as King orange peel ( Citrus sinensis ), lemongrass ( Cymbopogon flexuosus ), peppermint ( Mentha arvensis ), and betel leaf ( Piper betle ). The antifungal effect of these essential oils was determined by the Kirby-Bauer disc diffusion technique. In addition, the antifungal properties of the essential oils were also assessed through their effects on the reproduction of C. albicans and the spore germination, mycelium elongation, and sporulation of A. fumigatus . The results demonstrated that all peppermint, lemongrass, and betel leaf essential oils showed antifungal activity against C. albicans and A. fumigatus . Especially, betel leaf essential oil could perform antifungal activity at a low dilution concentration of 10% and could also inhibit the reproduction of C. albicans and the spore germination, mycelium elongation, and sporulation of A. fumigatus . Meanwhile, orange peel essential oil did not exhibit any antifungal properties.
{"title":"The antifungal activity of essential oils from some plants in Vietnam against the pathogenic fungi Candida albicans and Aspergillus fumigatus","authors":"Vũ Xuân Tạo, Trần Bảo Trâm, N. Hien, T. H. Dung, T. Tuan","doi":"10.31276/VJSTE.62(3).70-75","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).70-75","url":null,"abstract":": Vietnam possesses an abundant and highly diverse resource of plants. Therefore, the search and evaluation of bioactive compounds extracted from these plants are a potential research direction to support developing products that improve human health. The purpose of this study is to assess the antifungal activity of some essential oils produced by materials harvested in Vietnam such as King orange peel ( Citrus sinensis ), lemongrass ( Cymbopogon flexuosus ), peppermint ( Mentha arvensis ), and betel leaf ( Piper betle ). The antifungal effect of these essential oils was determined by the Kirby-Bauer disc diffusion technique. In addition, the antifungal properties of the essential oils were also assessed through their effects on the reproduction of C. albicans and the spore germination, mycelium elongation, and sporulation of A. fumigatus . The results demonstrated that all peppermint, lemongrass, and betel leaf essential oils showed antifungal activity against C. albicans and A. fumigatus . Especially, betel leaf essential oil could perform antifungal activity at a low dilution concentration of 10% and could also inhibit the reproduction of C. albicans and the spore germination, mycelium elongation, and sporulation of A. fumigatus . Meanwhile, orange peel essential oil did not exhibit any antifungal properties.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78216556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-30DOI: 10.31276/VJSTE.62(3).90-96
V. D. Vu, H. Pham, T. Bui
: Climate change and sea level rise (SLR) have greatly affected the coastal land use of the Nam Dinh province. It has especially impacted the mangrove forests in coastal plain areas. According to the monitoring data from management units, saline intrusion due to SLR tends to expand in scope, affecting and reducing the area of mangrove ecosystems. From this situation, it can be seen that the impact assessment and estimation of economic loss in coastal provinces such as Nam Dinh is incredibly necessary to help the localities proactively respond to climate change and SLR, which is in line with the national target program on climate change. This research, which uses methods of evaluating economic values, aims to quantitatively assess the extent of damage caused by SLR on an area of mangrove forests in Giao Thuy district, Nam Dinh province. The valuation of these impacts will provide a basis for scientists, research institutions, and localities to proactively mitigate and adapt to climate change. Research results show the damage of climate change and SLR to the coastal mangrove forests in Giao Thuy and the risk to agricultural land use in the Nghia Hung and Hai Hau districts. These results also provide warning of the potential damage caused by SLR to dike and irrigation systems in the coastal districts of the Nam Dinh province, which follow Xuan Truong, Giao Thuy, Hai Hau, and Nghia Hung.
{"title":"A study on the effects of sea level rise on mangrove ecosystem in Giao Thuy district, Nam Dinh province","authors":"V. D. Vu, H. Pham, T. Bui","doi":"10.31276/VJSTE.62(3).90-96","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).90-96","url":null,"abstract":": Climate change and sea level rise (SLR) have greatly affected the coastal land use of the Nam Dinh province. It has especially impacted the mangrove forests in coastal plain areas. According to the monitoring data from management units, saline intrusion due to SLR tends to expand in scope, affecting and reducing the area of mangrove ecosystems. From this situation, it can be seen that the impact assessment and estimation of economic loss in coastal provinces such as Nam Dinh is incredibly necessary to help the localities proactively respond to climate change and SLR, which is in line with the national target program on climate change. This research, which uses methods of evaluating economic values, aims to quantitatively assess the extent of damage caused by SLR on an area of mangrove forests in Giao Thuy district, Nam Dinh province. The valuation of these impacts will provide a basis for scientists, research institutions, and localities to proactively mitigate and adapt to climate change. Research results show the damage of climate change and SLR to the coastal mangrove forests in Giao Thuy and the risk to agricultural land use in the Nghia Hung and Hai Hau districts. These results also provide warning of the potential damage caused by SLR to dike and irrigation systems in the coastal districts of the Nam Dinh province, which follow Xuan Truong, Giao Thuy, Hai Hau, and Nghia Hung.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79965087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-30DOI: 10.31276/VJSTE.62(3).15-18
T. L. Nguyen, H. G. Tran, Thi Kim Oanh Vu, T. Pham, Ngoc Thuc Dinh, Anna Stojakowska, Bich Ngan Truong
Maesa membranacea A. DC. (Myrsinaceae) is an evergreen shrub that grows in China, Vietnam, and Cambodia. in Vietnam, the leaves and roots of this species have been used as traditional medicine for the treatment of fever and hepatitis [1]. Many Maesa plants have also been used as a folk remedy in African and Asian countries. Previous chemical studies on the Maesa species have revealed the presence of quinone, saponin triterpenoid, and flavonoid compounds [2-5]. The plant’s extracts and chemical constituents have displayed various pharmacological properties such as anticancer, antimicrobial, antiviral, and anti-leismania activity [2-5]. However, until now, no chemical study has been reported on Maesa membranacea. in this paper, we report the isolation and structure elucidation of six compounds including kaempferol (1), (-)-epicatechin (2), betulinic acid (3), p-hydroxybenzoic acid (4), vanilic acid (5), and protocatechuic acid (6) from the stems of Maesa membranacea. The structures of these compounds have been determined by NMR, MS analysis, and comparison with previously reported studies.
{"title":"Chemical constituents isolated from stems of Maesa membranacea","authors":"T. L. Nguyen, H. G. Tran, Thi Kim Oanh Vu, T. Pham, Ngoc Thuc Dinh, Anna Stojakowska, Bich Ngan Truong","doi":"10.31276/VJSTE.62(3).15-18","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).15-18","url":null,"abstract":"Maesa membranacea A. DC. (Myrsinaceae) is an evergreen shrub that grows in China, Vietnam, and Cambodia. in Vietnam, the leaves and roots of this species have been used as traditional medicine for the treatment of fever and hepatitis [1]. Many Maesa plants have also been used as a folk remedy in African and Asian countries. Previous chemical studies on the Maesa species have revealed the presence of quinone, saponin triterpenoid, and flavonoid compounds [2-5]. The plant’s extracts and chemical constituents have displayed various pharmacological properties such as anticancer, antimicrobial, antiviral, and anti-leismania activity [2-5]. However, until now, no chemical study has been reported on Maesa membranacea. in this paper, we report the isolation and structure elucidation of six compounds including kaempferol (1), (-)-epicatechin (2), betulinic acid (3), p-hydroxybenzoic acid (4), vanilic acid (5), and protocatechuic acid (6) from the stems of Maesa membranacea. The structures of these compounds have been determined by NMR, MS analysis, and comparison with previously reported studies.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75357000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-30DOI: 10.31276/VJSTE.62(3).19-25
Q. H. Le, Tsl Hi-Tech Training, Nguyễn Ngọc Trân, Thi Cam Tuyen Nguyen, H. Nguyen, Kien Trieu Lac, Thi Ngoc Anh Pham, Pham Ngoc Son Chu
: Agilent’s innovative EMR-Lipid and Captiva EMR-Lipid sorbents efficiently replace the traditional QuEChERS d-SPE clean-up products in selective lipid removal from fatty matrices, thus improving instrumental analytical reproducibility, reliability, and long-term use. These products have dual functionality; a hydrophobic interaction between the sorbent with long aliphatic lipid chains of the matrices, which allows for complete lipid retention, and a size exclusion property that does not retain analytes, thus this maximizes, in principle, analyte recovery in any sample. As most of the analytes under study were polar or not highly nonpolar and had a relatively large size, the examination of small-sized nonpolar or less polar compounds is necessary to check for partial retention by the sorbents and if any, further precautions should be taken when using these sorbents. These queries are answered in our present communication concerning the analytes Trifluralin (logP: 5.27), Fipronil (logP: 4.0), and Clenbuterol (logP: 2.63).
{"title":"Comparison and applicability of Agilent EMR-Lipid and Captiva EMR-Lipid Sorbents in QuEChERS method for food analysis","authors":"Q. H. Le, Tsl Hi-Tech Training, Nguyễn Ngọc Trân, Thi Cam Tuyen Nguyen, H. Nguyen, Kien Trieu Lac, Thi Ngoc Anh Pham, Pham Ngoc Son Chu","doi":"10.31276/VJSTE.62(3).19-25","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).19-25","url":null,"abstract":": Agilent’s innovative EMR-Lipid and Captiva EMR-Lipid sorbents efficiently replace the traditional QuEChERS d-SPE clean-up products in selective lipid removal from fatty matrices, thus improving instrumental analytical reproducibility, reliability, and long-term use. These products have dual functionality; a hydrophobic interaction between the sorbent with long aliphatic lipid chains of the matrices, which allows for complete lipid retention, and a size exclusion property that does not retain analytes, thus this maximizes, in principle, analyte recovery in any sample. As most of the analytes under study were polar or not highly nonpolar and had a relatively large size, the examination of small-sized nonpolar or less polar compounds is necessary to check for partial retention by the sorbents and if any, further precautions should be taken when using these sorbents. These queries are answered in our present communication concerning the analytes Trifluralin (logP: 5.27), Fipronil (logP: 4.0), and Clenbuterol (logP: 2.63).","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79651516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-30DOI: 10.31276/VJSTE.62(3).62-67
Quynh Lê, Yen Hoang, T. Pham, Honggui La, N. T. Nguyen, Anh Xuan Duong, Thao Lê, L. H. Le, H. X. Pham, H. Chu
Peanut (Arachis hypogaea) is considered to be one of the most important legume crops and is mainly cultivated in tropical and subtropical areas. These legumes provide a good source of protein, monounsaturated fats, and antioxidants [1]. Several peanut by-products such as peanut meal, peanut skin, peanut hull, and peanut vine can be used by the food processing industry and consequently play an essential role in food security [2]. However, peanut production and quality are severely affected by abiotic stress [3].
{"title":"Identification, structural characterization, and in silico expression analysis of the sucrose transporter ’SWEET’ gene family in peanut (Arachis hypogaea)","authors":"Quynh Lê, Yen Hoang, T. Pham, Honggui La, N. T. Nguyen, Anh Xuan Duong, Thao Lê, L. H. Le, H. X. Pham, H. Chu","doi":"10.31276/VJSTE.62(3).62-67","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).62-67","url":null,"abstract":"Peanut (Arachis hypogaea) is considered to be one of the most important legume crops and is mainly cultivated in tropical and subtropical areas. These legumes provide a good source of protein, monounsaturated fats, and antioxidants [1]. Several peanut by-products such as peanut meal, peanut skin, peanut hull, and peanut vine can be used by the food processing industry and consequently play an essential role in food security [2]. However, peanut production and quality are severely affected by abiotic stress [3].","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"63 6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77588178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-30DOI: 10.31276/VJSTE.62(3).56-61
A. Le
The Vietnamese Mekong river delta (MD) is the largest wetland region in the southernmost part of the Mekong river basin and connects more than 700 km of coastal line to the East Sea and the Gulf of Thailand (Fig. 1). The Delta is four million ha in size (12% of total natural land of Vietnam) and hosts more than 18 million inhabitants (about 22% of the entire country’s population in 2009). For more than 300 years, the local people have lived close to rivers and streams to facilitate the domestic use of water, such as for agricultural cultivation, fishery, and river transportation. Thus, any change in the water source affects their activities and the ecosystem of the area. The MD is recognized as the largest agriculture and aquaculture production region of Vietnam. The delta supplies more than 53% of the nation’s staple food, rice (Fig. 2), 65% of the total fish production, and 75% of the tropical fruit trees. Further, rice production is considered to be the main economic sector, which occupies more than 60% of the labour force in the MD.
{"title":"Water balance for agriculture production in the dry seasons of the Mekong river delta in Vietnam","authors":"A. Le","doi":"10.31276/VJSTE.62(3).56-61","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).56-61","url":null,"abstract":"The Vietnamese Mekong river delta (MD) is the largest wetland region in the southernmost part of the Mekong river basin and connects more than 700 km of coastal line to the East Sea and the Gulf of Thailand (Fig. 1). The Delta is four million ha in size (12% of total natural land of Vietnam) and hosts more than 18 million inhabitants (about 22% of the entire country’s population in 2009). For more than 300 years, the local people have lived close to rivers and streams to facilitate the domestic use of water, such as for agricultural cultivation, fishery, and river transportation. Thus, any change in the water source affects their activities and the ecosystem of the area. The MD is recognized as the largest agriculture and aquaculture production region of Vietnam. The delta supplies more than 53% of the nation’s staple food, rice (Fig. 2), 65% of the total fish production, and 75% of the tropical fruit trees. Further, rice production is considered to be the main economic sector, which occupies more than 60% of the labour force in the MD.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81521130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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