Transport and communication routes

The availability of communication routes external to the site during and after a flooding event involves facilities that are not always under the direct control of the site administrators. Since the availability of such communication routes is a key part of the emergency planning, a dedicated analysis of the flooding scenario should be performed together with the competent authorities as part of the hazard evaluation for the site. 

The flood hazard may change over time as a result of various causes, namely  

The data obtained from flood forecasting and monitoring systems and from the operation of any warning systems should be periodically analysed for changes in the flood characteristics of drainage basins, including 

Indications of changes in the flood characteristics of drainage basins should be used to revise, as appropriate, the design flood values and to improve the protection of systems and structures, the forecasting and monitoring system, and the emergency measures. 

In some coastal areas land subsidence (human induced, relating to the extraction of oil, gas and water, or natural) may have to be taken into consideration in the estimation of the apparent water height at the site, to be combined with the phenomena resulting from climatic changes. 

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The Spaniards made very determined efforts to stamp out peyote practices. Over a period of two centuries, a great many Indians were flogged and sometimes killed when they persisted in using it In one instance, an Accaxee s eyeballs were said to be gouged out after three days of torture "then the Spaniards cut a crucifix pattern in his belly and turned ravenous dogs loose on his innards. With the breakup of the Mesoamerican civilizations and their extensive transportation and communication routes, peyote distribution was interrupted, and familiarity with the cactus receded to the Chihuahuan Desert. 

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