Towards a soil moisture drought monitoring system for South Korea

JOURNAL OF HYDROLOGY

卷:589

Article

Jung, Hahn Chul^1,2  Kang, Do-Hyuk^1,3  Kim, Edward¹  Getirana, Augusto^1,3  Yoon, Yeosang^1,4  Kumar, Sujay¹  Peters-lidard, Christa D.⁵  Hwang, EuiHo⁶ 

[1] NASA, Hydrol Sci Lab, Goddard Space Flight Ctr, Greenbelt, MD USA

[2] Korea Inst Ocean Sci & Technol, Korea Ocean Satellite Ctr, Busan, South Korea

[3] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA

[4] Sci Applicat Int Corp, Reston, VA USA

[5] NASA, Earth Sci Div, Goddard Space Flight Ctr, Greenbelt, MD USA

[6] K Water, K Water Inst, Water Resources Satellite Res Ctr, Daejeon, South Korea

关键词: Agricultural drought;    Soil moisture;    Precipitation;    Land surface model;   

DOI  :  10.1016/j.jhydrol.2020.125176

来源: Elsevier

【 摘 要 】

The Korea Land Data Assimilation System (KLDAS) has been established for agricultural drought (i.e. soil moisture deficit) monitoring in South Korea, running the Noah-MP land surface model within the NASA Land Information System (LIS) framework with the added value of local precipitation forcing dataset and soil texture maps. KLDAS soil moisture is benchmarked against three global products: the Global Land Data Assimilation System (GLDAS), the Famine Early Warning Systems Network (FEWS NET) Land Data Assimilation System (FLDAS), and the European Space Agency Climate Change Initiative (ESA CCI) satellite product. The evaluation is performed using in situ measurements for 2013-2015 and one month standardized precipitation index (SPI-1) for 1982-2016, focusing on four major river basins in South Korea. The KLDAS outperforms all benchmark products in capturing soil moisture states and variability at a basin scale. Compared to GLDAS and FLDAS products, the EAS CCI product is not feasible for long term agricultural monitoring due to lower data quality for early periods (1979-1991) of soil moisture estimates. KLDAS shows that the most recent 2015 drought event leads to highest drought areas in the Han and Geum River basins in the past 35 years. This work supports KLDAS as an effective agricultural drought monitoring system to provide continuous regional high-resolution soil moisture estimates in South Korea.

【 授权许可】

Free