VIETNAM JOURNAL OF HYDRO - METEOROLOGY

No

Research Paper and Authors

Page

1

A POPULAR SCIENCE VIDEO PROGRAM PROPOSED FOR PROMOTING SCIENTIFIC LITERACY IN WATER DISASTER SOLUTIONS ADAPTING CLIMATE CHANGE

Yi-Ching Chen¹ , Michelle Hui Lee² , Fu-Ming Chang³ , Mei-Xiu Lai ⁴

¹Department of Environmental Engineering, Da-Yeh University, Changhua, Taiwan

²Creation Production, Co., Taipei, Taiwan

³Department of Environmental Engineering, Da-Yeh University, Changhua, Taiwan

⁴Department of Environmental Engineering, Da-Yeh University, Changhua, Taiwan

ABSTRACT: Under climate changes, the traditional water control thinking has long been obsolete. “Adaptation” has been considered as one of the strategies for climate change. In addition to the adjustment of engineering technology and water management strategies, there are still non-engineering aspects considerations, too. Climate change has never been a simple question to wait for a simple answer. The sustainable development of water management strategy requires not only good scientific research and good communication, but also trustworthy science, clear policies, creative business opportunities and public participation. Sometimes, after damage, quarrel provoked by the people's grievances and public opinion also caused disaster, too. The reason behind this is that people have lack sufficient knowledge in science, let alone scientific literacy and the recognition of scientific value under extreme climate. The expression of the story in this popular science video will allow people to experience the universal value of the life community in which people and water are closely interdependent.

Keywords: Climate change, adaptation, water control, non-engineering aspect, popular science video.

1

2

METHOD OF CALCULATION & APPLICATION OF WQI INDEX TO ASSESS THE STATUS WATER QUALITY AND PROPOSAL OF MANAGEMENT LUY RIVER BINH THUAN PROVINCE

Huynh Phu¹

¹Hochiminh City University of Technology (HUTECH); No. 475 Dien Bien Phu, 25 Ward, Binh Thanh District, Hochiminh city, Vietnam

ABSTRACT: The objective of this study is to apply the WQI index to assess the quality of Luy river surface water flows through Binh Thuan province and propose solutions to improve surface water quality in accordance with the society economic development Binh Thuan. Quality of Luy river water most of the parameters in the upstream areas reach A2 column; QCVN 08-MT: 2015/BTNMT, except BOD5 and COD exceeding 1.07 - 2.83 times, while downstream only meets the level of B1 column. WQI values have large fluctuations in space and time, WQI in monitoring positions from 53 to 91 (June, 2018). How to manage and protect water resources both in quantity and quality, to ensure the society economic development with the protection of water resources . To solve this problem it is necessary to assess the needs of water use, identifying the factors likely to impact water resources, pollution assessment based on existing standards or models Vietnam and proposed environmental protection measures to ensure appropriate quality water for society economic development - Binh Thuan province. This paper focuses on assessing water quality Luy river from 2016 to present.

Keywords: Luy River Binh Thuan, water quality index, assessment, evaluate.

9

3

VULNERABILITY ASSESSMENT OF WATER RESOURCES SYSTEMS IN LAM DONG PROVINCE

Nguyen Thi Hang¹ , Nguyen Ky Phung²

¹Industrial University of HoChiMinh city

²Department of Science and Technology of Ho Chi Minh City

ABSTRACT: In recent years, Lam Dong's water resources have not only changed in terms of quality and quantity of water, but this has affected the economic, social and living environment in the region. Based on UNEP guidelines, the vulnerability of water resources in the study area has been explored by isolating important issues related to the different functions of the water resource systems in a storage facility. area. At present, the vulnerability index for the river basin in Lam Dong (VI) reaches 0.29 in the river basin with a vulnerability index for medium water resources. Assessing the vulnerability of basin water resources is the basis for scientists to provide appropriate management solutions in the direction of sustainable development.

Keywords: Vulnerability assessment, Lam Dong

16

4

THE EFFECT OF CLIMATE CHANGE ON THE SURFACE WATER RESOURCES OF THE LAM DONG PROVINCE

Nguyen Thi Hang¹ , Nguyen Ky Phung²

¹Industrial University of HoChiMinh City

²Department of Science and Technology of Ho Chi Minh City

ABSTRACT: Lam Dong is a province located upstream of the Dong Nai river system. Although not as complicated as the downstream provinces affected by natural disasters related to sea level rise, Lam Dong suffers from typical disasters such as droughts and floods. This study focused on assessing the impact of precipitation on flow changes by Mike NAM model. Under the impact of climate change, the results of river basin flow calculations according to climate change scenarios show that the flow of river basins has a marked change in stages, and in particular , under the influence of climate change, the trend tends to increase. Annual flow, in the period 2016- 2035, the Dong Nai river basin increases by 1.75% on average, the Krong No river basin increases by 1.63%, the La Nga river basin increases by 1.79% and the Luy river area Cai Phan Thiet river increased by 2.2%. Research results can serve as a basis for local reference in water resource planning and socio-economic development.

Keywords: Climate change, water resources, Lam Dong, Mike NAM.

25

5

DYNAMICAL ESTUARINE ECOSYSTEM MODELING OF PHYTOPLANKTON SIZE STRUCTURE USING STELLA

Bach Quang Dung¹

¹Vietnam Journal of Hydrometeorology, Vietnam Meteorological and Hydrological Administration, Hanoi, Vietnam.

ABSTRACT: An ecosystem model was developed for sizestructured phytoplankton dynamics of coastal bay. State variables of the model include major inorganic nutrients (NO2 - +NO3 - , NH4 +, PO4 3- , Si), size classes of phytoplankton (microphytoplankton (>20µm), nanophytoplankton (<20µm), two classes of zooplankton (mesozooplankton, microzooplankton), and organic matters (POC, DOC). The iconographic interface of STELLA model was used to facilitate construction of the dynamic ecosystem model. The ecosystem model was integrated with STELLA 7.0 using a 4th order Runge-Kutta method (a numerical variable time step). The developed method suggested that the dynamical model using STELLA software can be useful to study phytoplankton dynamics in the pelagic coastal ecosystem. Keywords: Ecosystem model, Phytoplankton, Zooplankton, STELLA.

Keywords: Ecosystem model, Phytoplankton, Zooplankton, STELLA.

35

6

POWER DISSIPATION INDEX OF TROPICAL CYCLONES IN THE EAST SEA

Le Thi Thu Ha¹ , Dang Thanh Mai¹ , Doan Quang Tri²

¹Meteorological and Hydrological Forecasting Management Department, Hanoi, Vietnam

²Viet Nam Meteorological and Hydrological Administration, Hanoi, Vietnam

ABSTRACT: In this paper, through statistics of tropical cyclones in the East Sea from 1961 to 2017, the research team calculate Tropical Cyclone Power Dissipation (PDI), defined the maximum wind speed and the life time of tropical cyclones, compare with some other indicators that have been used by other authors such as NetTC in the East Sea to see the correlation between indicators and factors related to climate change such as sea surface temperature, Nino 3-4. Since then, the tendency of PDI increase, the correlation coefficient with Nino 3-4 is positive in the East Sea region, but this correlation is small.

Keywords: PDI, NetTC.

45

7

OBSERVED PRECIPITATION CHARACTERISTICS IN MJO PHASES OF VIET NAM

Le Minh Duc¹ , Le Thi Hong Van² , Hoang Phuc Lam²

¹Ha Noi University of Natural Resources and Environment

²National Center for Hydro-Meteorological Forecasting

ABSTRACT: The research uses synoptic station data and MJO index to analyse the precipitation distribution all over Viet Nam. The mean rainfall amount in the Northern region tends to increase in MJO phases 1 and 2; the rainfall anomalies in the North Central provinces are positive in phases 3, 4 and 5; from Middle Central to Southern provinces, MJO increases the rainfall, especially in phases 4 and 5. During transitional seasons (MAM and SON), positive rainfall anomalies in those wet phases tend to be higher than those in summer and winter, especially in SON.

Keywords: Rainfall anomaly, MJO, wet phases.

51

8

RESEARCH ON THE CRITERIA TO DETERMINING ABNORMAL MID-WINTER WARM SPELLS IN THE NORTHERN PART OF VIET NAM

Le Thi Thu Ha¹ , Vo Van Hoa² , Pham Thi Cham¹

¹Meteorology and Hydrology Forecasting Management Department

²Red-river Delta Regional Hydro-Meteorological Center

ABSTRACT: The objective of the paper was to characterise the climatology of surface temperature in the mid-winter months (DJF) in the northern part of Vietnam in the years 1971-2016 and determine the abnormal mid-winter warm spells and their statistic characteristics basing given criteria. The results shown that abnormal warm spells occur in January when the daily average air temperature is greater than 3o C in comparison with the given standard threshold (the sum of the climatological everage and standard deviation values of monthly mean temperature). Meanwhile, this threshold for December and February is only 1.5o C. The daily average air temperature during the period of active of abnormal mid-winter warm spells is in the range of 22-25o C, while the daily maximum air temperature is about 26-29o C, eventhrough can be reached to 30-33o C.

Keywords: Abnormal warm spells in midwinter, Northern part of Vietnam.

64