ASSESSMENT OF METEOROLOGICAL DROUGHT IN THANH HOA PROVINCE

DOI: 10.18173/2354-1059.2023-0075

Tóm tắt

The drought degree at Thanh Hoa province was assessed through drought index K and monthly drought frequency. According to the climate averages, the annual mean drought index K<1 represents that the region is humid for the whole year. However, in terms of the drought degree, during the winter period (from November to February of the following year), this is a drought period throughout the study area with a K value ranging from 1 to 3.9 with 2 classes: mild drought, and moderate drought. The extreme drought years often coincide with the years of strong El Niño. The drought regionalization for Thanh Hoa province was built based on statistical processing of drought degree for each meteorological station in the area, and criteria for determining drought seasons and the number of months with significant drought frequency ≥ 30%. The results divided Thanh Hoa province's territory into 3 drought classes: mild drought, moderate drought, and extreme drought. The results of the assessment of meteorological drought in the Thanh Hoa province are the scientific basis for the arrangement and conversion of crop structure in agricultural production and making an important contribution to the prevention and mitigation of drought hazards.