1. Title, Journal and Authors
Title: New methodology of evaluation of best management practices performances for an agricultural watershed according to the climate change scenarios: A hybrid use of deterministic and decision support models
Journal: Ecological Engineering
Authors: Dong Jin Jeona, Seo Jin Kib, YoonKyung Chac, Yongeun Parkd, Joon Ha Kim
This paper presents the BMP's assessment of guns changing in the future according to climate change.
This study aims to assess how the relative effects of agricultural BMPs change with changing climates, hypothesizing that optimal BMPs in current climates may not be optimal in future warming climates.
The SWQT + Multi Objective Decision Support System (MODS) is used to select the optimal BMPs. This represents the best compromise between load reduction and implementation costs.
1. The SWAT model was effective in predicting the pollutant emission and accompanying concentration profile of YS steel on a monthly basis. The simulated and observed data matched each other fairly well during the calibration and verification period.
2. The three climate change scenarios (RCP 2.6, 4.5 and 8.5) developed in the IPCC database showed higher precipitation and temperature than the current state of the YS basin. The monthly sediment and TP load of YS steel were generally found to be related to precipitation strength. However, the TP load appeared to be greatly affected by the time of fertilizer application (i.e., May each year).
3. Because the performance of BMP is highly dependent on land-use patterns, detailed analysis of the selection of BMP or its combination was recommended in response to the characteristics of the basin, such as climate and land-use patterns, along with the target pollutants.
3. Originality and Creativity
a Rainfall RCP 4.5 is noticeably high in June and August.
b Temperature of RCP 8.5 changes significantly
c The sediment load is the highest in RCP 4.5
d The TP load is the highest in June compared to other months.
Previous studies suggested a strong relationship between sediment and TP yield as well as between maximum TP yield and fertilizer application ratio (or timing), but such an effect appeared to decrease in new weather scenarios. Therefore, sediment and TP yield vary considerably from scenario to scenario.
In RCP 4.5, the percentage change in the optimized BMP configuration was the highest at 33%.
The efficiency of TP removal differed in BMP types, climate conditions, and crop types. The TP removal efficiency of CT in both rice and beanfield areas was not much different in current and future climate conditions.
4. Application to research
Ma, Kyoung Rim / M.S. program
Environmental Systems Engineering Lab.
School of Earth Sciences and Environmental Engineering
Gwangju Institute of Science and Technology
1 Oryong-dong Buk-gu Gwangju, 500-712, Korea
Phone : 010-5058-6832
E-mail : firstname.lastname@example.org