Number of times per year when the Thames Barrier was closed to avoid a risk of flooding. Specific Indicator The Thames Barrier is closed when high water levels at Southend and the flow of the River Thames at Teddington Weir (the tidal limit of the Thames) reach critical levels.The specific indicator is the number of times per year that the Thames Barrier is closed to avert a risk of flooding.[Source:Environmant Agnecy, Thames Barrier, Eastmoor St., Charlton, London SE7 8LX]. Relevance The Thames Barrier was commissioned in 1982 and cost ,530 million.It was designed to provide protection for London from tidal flooding until 2030 (and, by raising the gates, beyond). Over 150 km2 of London lies below high tide level and the homes of 750,000 Londoners are at risk from a major storm surge.urrently, the major flood threat to central London is from storm surges-when meteorological conditions (primarily atmospheric pressure and wind) exaggerate tidal peaks. Global warming and the resulting rise in sea levels (involving both thermal expansion and contributions from ice melt) will increase this risk.
The IRS mileage reimbursement rate is an optional rate, recommended by the Internal Revenue Service in the U.S., that is used to calculate the deductible costs of operating an automobile for business, medical, charitable, or moving to a new home reasons.
the internal revenue service irs establishes a tax ceiling on reimbursement for business travel by car the general services administration gsa then sets the mileage reimbursement rate s for federal employees and uniformed members at or below that ceilinggsa has set the rate for business travel tdy at $ 0 56 milethe irs ordinarily updates the mileage rates once in each calendar year however on occasion a special adjustment has been made within the year in recognition of changed costs2he tdy mileage rates consider the fixed and variable costs to operate a car gasoline insurance wear and tear etc and are intended to reimburse the average expense of using a poc for the official government travel 3