Spatio-temporal Analysis of Potential Evapotranspiration and Precipitation for Nakdong River Basin

Ji Yeon Ha; Sang Min Kim

doi:10.5389/KSAE.2025.67.2.045

All Issue

2025 Vol.67, Issue 2 Preview Page Next Page

Spatio-temporal Analysis of Potential Evapotranspiration and Precipitation for Nakdong River Basin 낙동강 유역의 잠재증발산량과 강수량의 시공간적 분포특성 분석

2025. pp. 45-54

PDF XML

Abstract

The purpose of this study was to understand the water resource conditions in the Nakdong River basin through a spatio-temporal analysis of rainfall and potential evapotranspiration. The Penman-Monteith method was used to estimate potential evapotranspiration, and the difference between rainfall and potential evapotranspiration (P-PET) was calculated. To compare and analyze the spatial distribution, meteorological data-such as maximum temperature, minimum temperature, wind speed, humidity, and sunshine duration-from 21 weather observation stations (ASOS) in the Nakdong River basin were used, covering the period from 2011 to 2023. This period was standardized to the shortest observation timeframe for comparison purposes. This analysis revealed that the potential evapotranspiration across 21 stations ranged from 885 mm to 1,112 mm, with an average of 936 mm. The P-PET results showed that the southern region, particularly Busan, had abundant water resources, while northern areas like Bonghwa and Andong experienced water deficits. For analyzing the temporal distribution, 13 stations out of the 21, which had longer data periods, were selected, and data from 1973 to 2023 were used. The Mann-Kendall analysis indicated increasing trends in potential evapotranspiration at five stations.

Keywords

Penman-Monteith

potential evapotranspiration

Nakdong River

spatio-termporal analysis

References

REFERENCES

R. G. Allen, L. S. Pereira, D. Raes and M. Smith, FAO, Crop evapotranspiration - guidelines for computing crop water requirements - FAO irrigation and drainage paper 56, 300(9); D05109, Rome. (1998)

H. F. Blaney and W. D. Criddle, USDA. Tech. Bul, Determining consumptive use and irrigation water requirements, 1275; 59 (1962)

H. S. Chae, S. J. Kim and K. S. Jung, Journal of Korea Water Resources Association, GRID-based daily evapotranspiration prediction model (GRIDET), 32(6); 721-730, (in Korean) (1999)10.9798/KOSHAM.2018.18.7.71

H. K. Cho and S. M. Kim, Journal of the Korean Society of Agricultural Engineers, A study on the estimation of irrigation water for sewage treated water reuse for agriculture, 61(2); 97-104, (in Korean) (2019)10.5389/KSAE.2019.61.2.097

J. Doorenbos and W. O. Pruitt, FAO Irrigation and Drainage PaperCrop water requirements; 144, Rome. 24. FAO. (1977)

M. E. Jensen, R. D. Burman and R. G. Allen, ASCE, Evapotranspiration and irrigation water requirements (1990)

B. S. Kim, J. H. Sung, B. H. Lee and D. J. Kim, Journal of KOSHAM, Evaluation on the impact of extreme droughts in South Korea using the SPEI and RCP8.5 climate change scenario, 13(2); 97-109, (in Korean) (2013)10.9798/kosham.2013.13.2.09735014955PMC8790699

S. J. Kim, M. I. Kim, C. H. Lim, W. K. Lee and B. J. Kim, Journal of Climate Change Research, Applicability analysis of FAO56 Penman-Monteith methodology for estimating potential evapotranspiration in Andong Dam watershed using limited meteorological data, 8(2); 125-143, (in Korean) (2017)10.15531/ksccr.2017.8.2.125

E. J. Lee, M. S. Kang, J. A. Park, J. Y. Choi and S. W. Park, Journal of the Korean Society of Agricultural Engineers, Estimation of future reference crop evapotranspiration using artificial neural networks, 52(5); 1-9, (in Korean) (2010)10.5389/ksae.2010.52.5.001

J. W. Moon, Journal of the Korean Society of Hazard Mitigation, Analysis of reference evapotranspiration change in Korea by climate change impact, 18(7); 71-81, (in Korean) (2018)10.9798/KOSHAM.2018.18.7.71

J. W. Moon, S. J. Choi, S. K. Kang and J. J. Lee, Journal of Korea Water Resources Association, An evaluation of water supply reliability using AWS data in Korea, 45(8); 743-753, (in Korean) (2012)10.3741/jkwra.2012.45.8.743

M. Nouri, M. Homaee and M. Bannayan, Water Resources Management, Quantitative trend, sensitivity and contribution analyses of reference evapotranspiration in some arid environments under climate change, 31; 2207-2224 (2017)10.1007/s11269-017-1638-1

H. L. Penman, Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Natural evaporation from open water, bare soil, and grass, 193; 120-145 (1948)10.1098/rspa.1948.003718865817

C. S. Rim, Journal of Korea Water Resources Association, Homogeneity of climate aridity index trends using Mann-Kendall, 47; 643-656, (in Korean) (2014)10.3741/jkwra.2014.47.7.643

Q. Zheng, J. He, M. Qin, X. Wu, T. Liu and X. Huang, PLOS ONE, Spatiotemporal variation of potential evapotranspiration and its dominant factors during 1970-2020 across the Sichuan-Chongqing region, China, 17(6); e0268702 (2022)10.1371/journal.pone.026870235749445PMC9231715

Information

Publisher :The Korean Society of Agricultural Engineers
Publisher(Ko) :한국농공학회
Journal Title :Journal of Korean Society of Agricultural Engineers
Journal Title(Ko) :한국농공학회논문집
Volume : 67
No :2
Pages :45-54
Received Date : 2024-11-03
Revised Date : 2025-01-17
Accepted Date : 2025-01-31
DOI :https://doi.org/10.5389/KSAE.2025.67.2.045

Journal of Korean Society of Agricultural Engineers ISSN:1738-3692(Print) 2093-7709(Online) 한국농공학회논문집

All Issue

REFERENCES