CIGR2010-book-abstra..

IMPACT OF CLIMATE CHANGE ON DRAINAGE OUTFLOW AND WATER QUALITY
IN EASTERN CANADA
S. DAYYANI 1 , S.O. PRASHER 1 , C.A. MADRAMOOTOO 2 , A. MADANI 3 , S. LEBEL
1 S. DAYYANI, PhD Candidate, Department of Bioresource Engineering, McGill University, shadi.dayyanidardashti@mail.mcgill.ca., 1 S.
PRASHER, James McGill Professor and Chair, shiv.prasher@mcgill.ca., 2 C.A. MADRAMOOTOO, Dean, Faculty of Agricultural and
Environemental Sceinces, McGill University, chandra.madramootoo@mcgill.ca., 3 A. MADANI, Nova Scotia Agricultural College Professor,
Department of Engineering, Canada, amadani@nsac.ca.
CSBE100143 – The potential effects of climate change on the drainage outflow and nitrogen
pollution of a 4.2 ha tile-drained experimental field research facility located at St. Emmanuel,
Quebec are predicted using the latest version of the DRAINMOD 6.0 model. Under the assumption
of no change in land cover and land management, the model is applied in order to simulate annual,
seasonal and monthly changes in flow and NO3-N loads under current and future climate
conditions. The climate scenario under consideration in this study (1961 to 2100) is based on
projections from the Canadian Regional Climate Model (CRCM). The simulation results from the
CRCM model suggest an increase in temperature and precipitation in the region being studied.
Those changes result in a considerable increase in simulated mean annual subsurface flow in the
study area.
SUITABLE BUFFER STRIP WIDTH ALONG RIVERS FOR NITRATE N REMOVAL
FROM PADDY FIELD DRAINAGE
ZHANG ZHAN-YU 1 , CHI YI-XIA 1 , ZHU CHENG-LI 1 , XIA JI-HONG 1
1 ZHANG ZHAN-YU Department of Irrigation and Drainage Engineering, Hohai University, Nanjing 210098, China, zhanyu@hhu.edu.cn
CSBE100145 – The buffer strip play an important role in removal non-point source pollution and
improvement of the water quality of the river. Nitrate N in paddy field drainage can lead to the soil
and underwater pollution caused the eutrophication of rivers too. Based on discussing of the
function of buffer strips and the removal mechanism of nitrate nitrogen, the mathematical model
for simulation of solute transport and the suitable width in buffer strips was established, the model
accuracy was validated by the field experiment data. The distribution of nitrate nitrogen
concentration in buffer alfalfa strips under different paddy field drainage conditions was calculated,
and the buffer strips width was confirmed. The results showed that when the nitrate nitrogen
concentration of paddy drainage is 10mg/l, the suitable minimum width of buffer alfalfa strips is
7.3m, for 20mg/l is 15.0m for the removal rate of nitrate nitrogen in buffer strips reached 90%.
46
XVII th World Congress of the International Commission of Agricultural and Biosystems Engineering (CIGR) – Québec City, Canada – June 13-17, 2010