نتایج جستجو برای: شاخص spei
تعداد نتایج: 75015 فیلتر نتایج به سال:
Terrestrial ecosystems greatly contribute to carbon (C) emission reduction targets through photosynthetic C uptake.Net primary production (NPP) represents the amount of atmospheric C fixed by plants and accumulated as biomass. The Three-North Shelterbelt Program (TNSP) zone accounts for more than 40% of China's landmass. This zone has been the scene of several large-scale ecological restoration...
Due to a wide range of socio-economic losses caused by drought over the past decades, having reliable insight properties plays key role in monitoring and forecasting situations, finally generating robust methodologies for adapting various vulnerability situations. The most important factor causing is rainfall, but increasing or decreasing temperature consequently, evapotranspiration can intensi...
Drought is one of the major water-related natural hazards. Understanding spatial and temporal variation rainfall great importance in water resources planning management as it related with food security scarce resource, which becomes critical case drought events. The advent GIS to produce spatially interpolated map helps managers undertake appropriate measures relief prioritization mitigation wo...
Abstract Drought is one of the major natural disasters in world, and it important to understand grasp spatiotemporal evolution characteristics drought for monitoring prevention. In this study, standardized precipitation evapotranspiration index (SPEI) was calculated based on monthly average temperature data from 15 meteorological stations Henan Province, China during period 1987–2020. The droug...
This study assessed the meteorological and hydrological droughts their relationship over 30 years from 1985 to 2015 in largest river basin (Mahaweli River Basin (MRB)) Sri Lanka. Data 14 rainfall, 5 temperature, streamflow stations near MRB were used present study. Universal drought indices including Standardized Precipitation Index (SPI) Precipitation–Evapotranspiration (SPEI) assess droughts....
Greenhouse gas emissions have largely changed the global climate, leading to an increase in frequency and extent of droughts. Forests are essential natural resources, they play important role maintaining ecological security. Effectively monitoring drought stress forests can help promote sustainable forestry development. Solar-induced chlorophyll fluorescence is a spectral signal released by veg...
Drought is a significant challenge to semiarid Mediterranean grasslands, Increasing the accuracy of monitoring allows improving conservation and management these vital ecosystems. Meteorological drought commonly monitored by Standard Precipitation Index (SPI) or Evapotranspiration (SPEI). On other hand, agriculture estimated Vegetation Health (VHI). This work aims optimise correlation between b...
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