Analysis of Agricultural Drought in East Java Using Vegetation Health Index

Agrivita: journal of agricultural science

Luisa Febrina Amalo ; Rahmat Hidayat ; Sayidah Sulma

关键词: El Nio;    La Nia;    Rice production;    Vegetation Health Index;   

DOI  :  10.17503/agrivita.v40i1.1080

学科分类：农业科学（综合）

来源: Universitas Brawijaya * Fakultas Pertanian / Brawijaya University, Faculty of Agriculture

【 摘 要 】

Drought is a natural hazard indicated by the decreasing of rainfall and water storage and impacting agricultural sector. Agricultural drought assessment has been used to monitor agricultural sustainability, particularly in East Java as national agricultural production center. Identification of drought characteristics orrelated with El Nio-Southern Oscillation, and agricultural impact on paddy fields and rice production using VHI (Vegetation Health Index) were conducted. VHI is produced by TCI (Temperature Condition Index) and VCI (Vegetation Condition Index) derived from MODIS satellite data, LST (Land Surface Temperature) and EVI (Enhanced Vegetation Index), respectively. The results showed agricultural drought usually started in June, maximum in October and ended in November. Onset and end time drought tends to follow monsoonal rainfall pattern. El Nio 2015 showed long duration of agricultural drought (i.e.5 months), high severity (i.e. mild-extreme drought; VHI 0-40) and areal extent of drought approx. 197,343 km2, while during La Nia 2010 the areal extent was approx. 28,685 km2 with mild-severe drought (VHI 10-40). Impact of agricultural drought on paddy fields showed wider (smaller) areal extent in sub-round 3 (sub-round 1) from September-December (January-April). Areal extent of drought was negatively correlated with rice production (r=-0.79) which significant in 99 % confidence level.

【 授权许可】

CC BY-NC