Monitoreo de sequías en El Salvador mediante variables teledetectadas usando la plataforma Google Earth Engine

Abstract

<jats:p>&lt;p&gt;Drought is a phenomenon that causes great economic losses in the society and is being observed more frequently due to climate change. In Central America this event is related to the anomalous distribution of precipitation (P) in a short period, within the rainy season. Specifically, in El Salvador, the phenomenon socalled “canícula” is associated to a significant decrease in P that lasts few days, making difficult to monitor it with P alone, as it is currently done. At present, many indicators have been developed to characterize droughts. In particular, the standardized precipitation and the condition indices proposed by Kogan (1995) that use various sources of information, stand out. In this work, five indicators of water deficit were applied - the standardized P, evapotranspiration (ET), the soil moisture condition index (HSCI), the vegetation condition index (VCI) and water stress (EH)- to assess droughts in El Salvador. For this, satellite information, climate database and the application programming interface available on the Google Earth Engine platform were used. The behaviour of the indexes in the period 2015-2019 was analysed, particularly the extremely dry year 2015, to determine the monitoring capacity of the indicators used. The results obtained suggest that the proposed set of indicators allows monitoring the drought, by identifying the onset, impact and territorial extension of it in El Salvador.&lt;em&gt;&lt;/em&gt;&lt;/p&gt;</jats:p>

Efectos del Cambio Climático en Centroamérica

“…Las sequías se caracterizan por ser uno de los desastres naturales que afecta a la población mundial y produce pérdidas en la economía de la sociedad. En Centroamérica, la sequía se relaciona con la distribución anómala de la precipitación (P) dentro del periodo lluvioso y están estrechamente relacionados con el fenómeno El Niño -Oscilación Sur (Córdova, 2020).…”

“…En El Salvador dicho fenómeno ocurre de manera frecuente. La sequía es un fenómeno recurrente que afecta a toda Centroamérica, en especial a El Salvador ya que su producto bruto interno (PBI) depende en gran medida de la producción agrícola, que a su vez depende totalmente de la precipitación (Córdova , 2020).…”