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Phosphorus concentration in surface water and groundwater
3 Progress of Joint Research Activities
rd

Research No.: ㉖㉖ E-2 ODA Loan Joint Research Date: Oct. 16 , 2020
th
1 General Title Analyzing and modelling water and land resources
CTU: Van Pham Dang Tri (Leader), Truong Chi Quang, Le Tan Loi,
2 Core Members Nguyen Vo Chau Ngan, Nguyen Dinh Giang Nam, Tran Van Ty
Japanese Universities: SASAKI Jun (The University of Tokyo), MUTO Tetsuji (Nagasaki University)
3 Duration Jan.2018 – Dec.2020 (3 years) <1 Batch>
st
4 Main Objectives To simulate environmental changes to support early responses and adaptations
5 Focal Points
5 Focal Point Topic 2: The development of numerical models for predicting surface water pollution in a river
Topic 1: Modeling land-use change and developing strategies for sustainable land-use
management in response to impacts of climate change in the Vietnamese Mekong Delta Reach 1
Reach 2
Land use 2015 Land use
simulation 2015 Water quality monitoring location
in Cai Khe canal and Xang Thoi
lake, Can Tho, Vietnam Onsite monitoring
Kappa = 0.84
The land use changes model was built for Landuse 2015 Ammonium and Nitrate concentration at the monitoring points in low &
Soc Trang province Land use 2010 Rice Crops Fruit Shrimp high tide time -High tides increase the movement of water in canal and affected pH, DO, TDS…. concentration in the system
-Tide has varied effects on the nutrients status and phytoplankton community
tree
(ha) (ha) (ha) WQI (Water Quality Index)
(ha)
Rice (LUC) 130.512 1.664 2.080 368
Rice + Orther 544 576 96 1.232
Crops 0 7.140 640 1.104
Fruit tree 0 832 5.360 352 Salinity dynamic
Shrimp 768 1.024 1.232 44.240
References:
1. Trương Chí Quang, Võ Quang Minh, Nguyễn Hồng Thảo. 2019. Ứng dụng ảnh viễn thám phân tích sự thay đổi Result of DO(%) and tidal regime in canals and lakes
vùng canh tác lúa trong mùa khô vùng ven biển Đồng bằng sông Cửu Long. Khoa học Đất Việt Nam. 57. 5-10.
2. Quang Chi Truong , Kenichi Tatsumi, Thao Hong Nguyen, Vu Thanh Pham, Tri Van Pham Dang (in prep.).
Agent Based Modeling Approach for Land-use Change dynamics, a case study in Soc Trang province, Vietnam.
Land.
3. Trương Chí Quang, Nguyễn Thị Kim Loan, Văn Phạm Đăng Trí (in prep.) Đánh giá sự thay đổi sử dụng đất dựa
trên mô hình ra quyết định đa tiêu chí. Tạp chí Đại học Cần Thơ.
Topic 3: The interaction between coastal mangrove forest, tidal wave and coastal erosion References: Comparing the self-cleaning and recovery
1. Nguyen Dinh Giang Nam, Le Nhu Y, Nguyen Thi Kieu Diem, 2019. "Assessment of water
levels of water quality characteristic
quality in an urban lake and canal system in Cantho city, Vietnam". International
The overall objective 2. Conference on Sustainable Engineering And Infrastructure 2019 . parameters at high tide and low tide: EC
water pollution is recovered by 1.5 to 2
Nguyen Đinh Giang Nam, Le Nhu Y, Nguyen Quoc Cuong, Van Pham Dang Tri (in prep).
The research will be conducted “The tide effects on the water quality recovery in the urban lake-canal system in Can Tho times; Ammonium index, the recovery is
city, Vietnam”. VNU Journal of Science: Policy and Management Studies.
by empirical research methods to 3. Nguyen Đinh Giang Nam, Le Nhu Y, Nguyen Quoc Cuong (in prep). Đánh giá sức chịu tải negligible, only 0.2 to 0.5 times; the
of
Nitrate
was
pollutant
và khả năng tự làm sạch của đoạn rạch Cái Khế, thành Phố Cần Thơ. Tạp chí Đại học Cần
recovery
measure mangroves structure and Diagram of installation of wave - gauges Thơ determined about 1.2 - 1.5 times.
collect the wave energy from the Topic 4: Geomorphological changes of secondary channels under climate change
fields at coastal zone in Soc scenarios and agri-aquaculture activities along the neighboring floodplain
Trang province. The overall GPS ADCP
Reference: Study area objective: Soc Trang Province
1. Lê Tan Loi, Ly Trung Nguyen, Wave gause 1. This study was to
Nguyen Ngọc Duy & Van Pham
Đang Tri, 2019. Evaluating the wave Ground elevation apply the 2-D Sampling
reducing ability of mangrove flow model for a
thickness in Tran De district, Soc small tidal river
Trang province. Can Tho University with insufficient
Journal of Science. Collecting suspended sediment and Measuring bathymetry and
DOI:10.22144/ctu.jsi.2019.127. data. Study area river bed material hydraulic parameters
2. Le Tan Loi, Nguyen Ngoc Duy, Van 2. The mass of 0 300 600 900 1200 1500 Nồng độ SSC (mg/L) 2400 2700 3000 3300 3600
2100
1800
Pham Dang Tri (in prep.). Wave data analysis sediment from 0 -2
Correlation between tidal wave Mangrove forest structure -4 -6
energy and forest structures in the upstream to -8
coastal area of Soc Trang province, downstream each Độ sâu (m) -10 -12
Viet Nam. Can Tho University season. Sediment transport -14
Journal of Science. 3. Supplying -16
3. Le Tan Loi, Ly Trung Nguyen, Van -18 -20
16-17/06/2018
Pham Dang Tri & Jun Sasaki (in scenario under (In-door) Analyzing Sediment and SSC along the river from 28-29/08/2018 04-08/10/2018
prep.). Wave Energy Dissipation due the impact of
to Mangrove Forest Structures and The correlation between the Wave conditions and cumulative climate change suspended sediment concentration upstream to downstream (GOM)
Change in significant wave
Bandwidth: A Case Study in the mangrove forest and wave height as a function of water distributions of significant wave Hydrodynamics modelling My Thanh station Tran De station 0.89
height during three deployment
Vietnamese Mekong Delta. Wetland. energy depth sites 72
References: 0.32 121
Topic 5: Water quality changes given impacts of intensive farming systems 1. Nguyễn Văn Khanh, Nguyễn Thanh Quân, 0.58
Dương Thị Trúc, Trương Minh Nhật và Văn
Phạm Đăng Trí, 2019. Đánh giá vận chuyển bùn 334
Literature review cát lơ lửng, phân bố trầm tích đáy, địa mạo và 0.40 284
chế độ thủy lực sông mỹ thanh, tỉnh sóc trăng,
Tạp chí khoa học Trường đại học Cần Thơ, 27-
37. Simulation cases, the modified
Arranging the 2. Nguyen Van KHANH, Akio OKAYASU, 2-D flow model of My Thanh River Yearly changes of four primary tidal data from 1985 to 1990
constituents and mean-sea-level
Tsuyoshi IKEYA, Daisuke INAZU, Van Pham
experiment Dang TRI, Practical flow modelling of a small
tidal river with insufficient hydrodynamic
Water sample testing information, Journal of Japan Society of Civil
Collecting water and Setting the field experiment Rain and evaporation measuring instruments at the lab Engineers, Ser. B2 (Coastal Engineering), 2019,
soil samples Volume 75, Issue 2, Pages I_187-I_192.
RESULT 3. Nguyen Van KHANH, OKAYASU, A., IKEYA,
N and P content varies with the amount of T., TAKAGI, H., Van Pham Dang TRI (in
Developing a model to fertilizer in both surface water, groundwater and prep). Application of 2-dimensional flow model
to a small river in Vietnamese Mekong Delta
estimate the residues of soil. During the study, N and P values ​​were with incomplete boundary conditions.
fertilizer recorded showing that rice did not absorb all of Hydrological Sciences Journal Spatial distribution of measured The simulation results of the improved 2-D flow model of My Thanh
fertilizer and some were lost through surface depth samples River
water, groundwater and soil.
Estimating pollution - For surface water, N content increased strongly Topic 6: Assessment of sustainable groundwater resources management in urban areas in the
concentration in the first days after top dressing, then decreased Phosphorus concentration in surface Nitrogen concentration in surface
water and groundwater
water and groundwater
gradually. The N and P content in surface water is Vietnamese Mekong Delta under socio-economic development and climate change context
References: affected by rain and evaporation.
Nguyen Vo Chau Ngan, Nguyen
Thi Thu Thao, Pham Thị Huynh - The change in N and P concentrations in Literature and Data collection 4 Can Tho 0
Nhu, Tran Thị Thuy Loan, Nguyen groundwater and soil is similar to surface water, 2
Dinh Giang Nam, 2019. Absorbility increasing with fertilization and decreasing 0 0.1
of nitrogen and phosphorus in the thereafter. However, the values ​​of N and P change Evaluating the
water bodies of an intensive paddy relatively little and relatively stable, due to the GWL and land -2 0.2
rice field. Journal of Vietnamese current state of subsidence Hydraulic head (meter) -4 Cumulative subsidence (meter)
Environment. Special Issue interference of humus content in the topsoil layer GWR -6 r = 0.99 0.3
aquifer: qp23
APE2019. 75 - 80. in the field. Nitrogen and phosphorus in soil Holocene qh Upper Pleistocene qp 3 -8 0.4
E2 - Program timeframe Pumping test Calibrating and -10 -12 0.5
Validating of GWL Annual groundwater extraction
Content 2018 2019 Developing simulation. induced subsidence rate for
Q.1 Q. 2 Q. 3 Q. 4 Q.1 Q. 2 Q. 3 Q. 4 the scenario Forecasting Upper-Middle Pleistocene Total subsidence year 2006-2010 from
Minderhoud et. al (2017)
Results
Literature review - Maps of exploitation and monitoring wells ➔ The qp 2-3
Arranging the experiment current state of GWR exploitation;
- Fluctuation of GWL at monitoring wells ➔ GWL
Collecting samples reduction and land subsidence
Developing the model References:
1. Tran Van Ty, H.V.T. Minh, L.H. Boi Ngan, D.T. Nhan and T.C. Luan. Pumping test for
Forecasting determining hydrogeological parameters for groundwater flow simulation in Can Tho city,
Vietnam. Kỷ yếu Hội nghị Khoa học toàn quốc VIETGEO 2019 “Địa kỹ thuật và xây dựng
phục vụ phát triển bền vững”. Vĩnh Long, 25-26/10/2019. Trang 433-440. NXB Khoa học
và Kỹ thuật. ISBN: 978-604-67-1397-5. Observed hydraulic head time series at district representative
Writing the scientific journal 2. Tran Van Ty, Huynh Vuong Thu Minh, Ram Avtar, Pankaj Kumar,Huynh Van Hiep, and monitoring wells and corresponding cumulative calculated subsidence
Masaaki Kurasaki. Spatiotemporal variations of groundwater level and its impact on land
subsidence in CanTho city, Vietnam. (Submitted to Water: ISSN 2073-4441)
3. Tran Van Ty and Huynh Vuong Thu Minh (in prep.). Simulation of groundwater level in
Can Tho city.
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