Through our study, we found that areas more prone to increasing agricultural runoff in the future are areas closer to the mountains. This could be due to higher anticipated rainfall, higher slopes and TWI. However, there are usually not much agricultural lands in those areas due to uneven terrain and difficulty to access from nearby markets. Looking inside the ALR areas, areas towards the northeast area is predicted to be higher risk for agricultural runoff, where there is more expected precipitation increase than the surrounding areas. The highest risk areas in our study area are around Agassiz, Laidlaw, and south of Hope. These areas were classified as High Risk to Highest Risk by our MCE Combined Analysis, Sensitivity Analysis and the Weighted Sum Analysis. The agricultural lands around Sumas Canal was the only area in the southern region which resulted in unusually higher risk when compared to its neighbouring ALR lands. This is likely due to the topographic features and the excess amount of lake bodies surrounding the Sumas Canal, as anticipated precipitation trend for this region is at a minimum.
Nevertheless, climate change is inevitable and all areas show an increasing trend in fall precipitation. While our results show variability in runoff risk, authorities should consider alternative management strategies in all farmlands in the Lower Fraser Valley in order to mitigate the widespread effects. Our study looks at specific regions in the Lower FVRD, however in nature all systems are somehow inter-connected and they are more complex and spatially autocorrelated than we can imagine. Stricter regulations on the timing and amount of fertilizer and pesticide application will mitigate the risks of agricultural runoff such as eutrophication downstream and sedimentation. Personnel responsible should especially focus on ALR located near Agassiz, Laidlaw, Hope, and the Sumas Canal and develop policies and framework to mitigate the risks associated with increased agricultural runoff in these regions. Future research could explore other factors playing a role in the proneness of ALR to agricultural runoff, as well as examining areas suitable for the expansion of ALR areas. As local and global food demand is expected to increase, a changing climate with milder winters and longer growing seasons will mean that farmers will need to produce more and more crops and livestock. It is then crucial that we investigate into the levels of environmental and wildlife risk associated with this increase in farming, so that we can be proactive and put forward actions to mitigate these risks as soon as possible. We hope that our findings will act as a framework for policymakers and farm authorities when regulating fertilizer and pesticide application rate and timing, and play a role in determining the future expansion of Agricultural Land Reserves.
