Several provinces of China experienced an intense drought episode during 2009 and 2010. The drought was particularly severe in southwestern and northern China, where the accumulated precipitation from May 2009 to April 2010 was about 25% less than normal. The decline of accumulated precipitation over northern China was mostly noticeable during the summer season of 2009 and it was comparable to ...

The objective of this study was to develop information mining methodology for drought modeling and predictions using historical records of climate, satellite, environmental, and oceanic data. The classification and regression tree (CART) approach was used for extracting drought episodes at different time-lag prediction intervals. Using the CART approach, a number of successful model trees were ...

Drought, which is one of the most complexes hazards, is a temporary, recurring meteorological event, originates in the lack of precipitation and is a typical feature of any climate. The psychological and environmental impacts, consequential economy, and personal hardship experienced following droughts in both developing and developed countries have revealed the vulnerability of all societies to...

Growing and changing demands on water supply, along with natural climate variability and possible anthropogenically induced climate change, make water resource management and planning increasingly challenging, particularly in arid regions. Instrumental climate and gaged streamflow records provide just a snapshop of recent natural hydrologic variability. In this paper, we use tree-ring-based ann...

drought monitoring, which is a crucial component of drought management, aims to provide information that enables and supports people and organizations to take actions to reduce potential drought-related impact and damage. we usually tend to focus on drought when it is occurring and to react when crises strike. however, recent experiences and developments on drought knowledge are encouraging soc...

the selection of high yielding and stress tolerance plant genotypes with the highest water use efficiency and productivity is one of the most important tools for field water management in arid and semi-arid regions. this study was conducted to identify drought tolerant flax families with the highest irrigation water productivity (iwp) among a population of 119 f3 families derived from a cross b...

ABSTRACT- Different soil potassium (K) pools including soluble, exchangeable and non-exchangeable in surface and subsurface soils may be totally used by canola roots at different growth stages under drought conditions. A field experiment was conducted for one growing season (2013-2014) to study K pools changes during growth stages of two rapeseed cultivars under drought. The experiment was arra...

the main purpose followed in this study was to identify and analyze the ways of coping up with drought in rural regions of zanjan province. the research method of the study was an analytical- explanatory one. the statistical population of the study consisted of experts of jihad- e- agriculture organization of zanjan province (n= 316). according to krejcie and morgan table, 175 individuals were ...