combating desertification which is a serious threat for the environment and human welfare requires understanding complex issues of this phenomenon using evaluation, awareness of severity of it's processes and determination of it's factors. so here, after recognizing the characteristics of the region showing existence desertification, we assess its current status with emphasis on clima...

abstract in order to evaluate the effects of different depths of irrigation by sprinkler irrigation system on water use efficiency (wue) of new early maize cultivar ksc302, an experiments was carried out in karj during 2006 and 2007. experimental design was split plot based on randomized complete blocks with three replications. main plots were three irrigation levels: 75%, 100% and 125% etc (es...

recently, design of cropping pattern based on water resources is getting a high priority. this scheme is complicated, and affected by multiple factors. for investigation, designer must gather a huge data, and classify them. the method of processing and analyzing of the information is important. the method of linear programming based on lingo software for hendijan irrigation and drainage network...

Chlorpyrifos is a common surface water contaminant in California, USA. We evaluated five years of chlorpyrifos use and surface water monitoring data in California's principal agricultural regions. Imperial County and three central coastal regions accounted for only 10% of chlorpyrifos statewide use, but displayed consistently high aquatic benchmark exceedances (13.2%-57.1%). In contrast, 90% of...

As the most populous country in world, China has a great shortage pressure of water resources. With acceleration urbanization, China’s usage different sectors will change significantly next few years. In order to investigate main reasons behind China, Logarithmic Mean Divisia Index (LMDI) model was adopted this paper from 2000 2020 with provincial data. Three effects, including that technology,...

This paper analyses whether the evolution of water law in the Australian colony of New South Wales (NSW) contradicts theoretical models that suggest in arid countries correlative, land based water rights will be replaced with individual ownership. Evidence from NSW shows a series of Supreme Court decisions between 1850-1870 adopted correlative riparian rights thereby implying that common law wa...