<Para ID="Par1">Based on the markov theory, the first-order markov joint transition probability of rainfall and reference crop evapotranspiration is analyzed to reveal their joint transition laws. Then using copula function, the joint probability distribution of rainfall and reference crop evapotranspiration is...</para>

Rainfall and grain yield are two closely related random variables to be worthy of studying. The meteorological yield explains the influences of weather changes on grain yield. Based on the data series from 1980 to 2006 in Jinghuiqu irrigation district of Shaanxi Province in China, the...

<Para ID="Par1">With the rapid development of economy, demand of water resources is becoming larger and larger, and over-exploitation of groundwater is common in many areas. Due to over-exploitation of groundwater over many years, a number of potential adverse hydrogeological problems have raised. To reduce...</para>