Driest Sentence Examples
The driest season is in September and October.
The peninsula of Arabia, with Syria, its continuation to the northwest, has some of the characteristics of the hottest and driest parts Arabia.
With the exception of the alkali flats, no portion of the desert is devoid of vegetation, even in the driest seasons.
In the north, the driest and best months are October, November and December; in the south, December, January, February and March.
Summer is the rainy season, and May, June and July the driest months of the year.Advertisement
In the western and southwestern parts the summer months are the wettest and the spring months are the driest; thus, at El Paso the rainfall amounts to 2.2 in.
With further experience it has become obvious that very few reservoirs are capable of equalizing the full flow of the three consecutive driest years, and each engineer, in estimating the yield of such reservoirs, has deducted from the quantity ascertained on the assumption that they do so, a certain quantity representing, according to his judgment, the overflow which in one or more of such years might be lost from the reservoir.
Besides, his style is that of the driest annalist.
It will find sustenance equally on the driest of soils as on the fattest pastures; upland and fen, arable and moorland, are alike to it, provided only the ground be open enough.
The south-east counties are the driest portions of the United States.Advertisement
The actual size of the reservoir which would certainly yield the assumed supply throughout the driest periods has therefore been largely a matter of judgment.
This capacity is represented by the height of the line a'a' (drawn parallel to a a from the point of maximum surplus f) vertically above the point of greatest deficiency c, and equal, on the vertical scale, to the difference between the height c = 48% and g= 78% or 30% of the stream-flow during the driest year.
This is true, but it is only so because we have made our reservoir large enough to contain in addition to its stock of 19%, at the beginning of the year, all the surplus water that passes during the earlier months in this driest year with its least favourable time-distribution of flow.
In assuming a demand at the beginning of the year below the mean, resulting in an overflow equal in this case to b e at the end of February and increasing our reservoir to meet it, we assume also that some additional supply to that reservoir beyond the 11% of the streamflow from the driest year can be obtained from the previous year.
In relation to this supply from the previous year the most trying assumption is that the rainfall of that year, together with that of the driest year, will be the rainfall of the two driest consecutive years.Advertisement
We have already seen that while the rainfall of the driest of 50 years is about 63% of the mean, that of the driest two consecutive years is about 15% of the mean.
It follows, therefore, that the year immediately preceding the driest cannot have a rainfall less than about 87% of the mean.
As the loss by evaporation is a deduction lying between a constant figure and a direct proportional to the rainfall, we should err on the safe side in assuming the flow in the second driest year to be increased proportionally to the rainfall, or by the difference between 63 and 87 equal to 24% of the mean of 50 years.
This 24% of the 50 years' mean flow is 38% of the driest year's flow in fig.
Having determined this evaporation for the second driest consecutive year and deducted it from the rainfall - which, as above stated, cannot be less than 87% of the mean of 50 years - we may, as shown on fig.Advertisement
The whole diagram shows, by the greater gradient of the unbroken straight lines, the greater demand which can be satisfied by the enlargement of the reservoir to the extent necessary to equalize the flow of the two driest consecutive years.
In the illustration the c' h is a little greater, measuring 471% of the flow of the driest year.
The line a" a" drawn from zero parallel to the first line, produced to the boundaries of the diagram, will cut the vertical at the end of the first year at the percentage of the driest year's flow which may be safely drawn continuously from the reservoir throughout the two years.
We find on the left-hand scale of yield that the height of the ordinate drawn to the 50-inch mean rainfall curve from 200,000 on the capacity scale, is 1457 gallons per day per acre; and the straight radial line, which cuts the point of intersection of the curved line and the co-ordinates, tells us that this reservoir will equalize the flow of the two driest consecutive years.
Similarly, if we wish to equalize the flow of the three driest consecutive years we change the co-ordinates to the radial line figured 3, and thus find that the available capacity of the reservoir must be 276,000 gallons per acre, and that in consideration of the additional expense of such a reservoir we shall increase the daily yield to 1612 gallons per acre.Advertisement
In this case the left-hand radial line passes through the point at which the coordinates meet, showing that the reservoir will just equalize the flow of the driest year.
Yet the hilly parts of the last-named country are rich in magnificent sites at sufficient altitudes for the supply of any parts by gravitation, and capable, if properly laid out, of affording a volume of water, throughout the driest seasons, far in excess of the probable demand for a long future.
Most of the streams maintain a good flow of water in the driest seasons, and in case of heavy rains many of them " underflow " the adjacent bottom lands, saturating the permeable substratum of the country with the surplus water, which in time drains out and feeds the subsiding streams. This feature is particularly true of the Saline, Solomon and Smoky Hill rivers.
The Guapore presents many difficulties to continuous navigation; the Baures and Itonama offer hundreds of miles of navigable waters through beautiful plains; the Mamore has been sounded by the writer in the driest month of the year for a distance of 500 m.
Their northern slope, which is occupied by the three Guianas first named, is saturated and river-torn; but their southern one, Brazilian Guiana, is in general thirsty and semi-barren, and the driest region of the Amazon valley.
But even in the coolest and driest of his pieces there is the mark of greatness, of grasp, of comprehension.
It is commonly believed that of underground water, and generally of artesian water, even the driest counties have an abundance.
In accordance with this model he has given to his own poem the form of a personal address, he has developed his argument systematically, and has applied the sustained impetus of epic poetry to the treatment of some of the driest and abstrusest topics.
It is a native of Middle Island, where it is said to grow on the driest rocks.
America. T. rhombifolia is dwarfer and with rounded leaflets, growing well even in the driest places.
While you may not be the most fashionable woman around, you will likely be the driest and that means a lot, whether you're out in the rain for work or for pleasure.
According to Travellers Worldwide, the best, driest months are December to March if you're planning to work on the west coast, south coast, or the hills; the best on the east coast are May to September.
This is just as necessary for keeping your skin comfortable in the driest conditions.
At the time when it is hottest and driest on the coast it is raining heavily in the Andes, and the rivers are full.
September is the wettest month; January the driest.
Along the coast the autumn months are the wettest and the spring months are the driest; for example, at Galveston the rainfall amounts to 5.7 in.
In the middle, eastern and north-eastern parts of Texas the spring months are the wettest and the winter months are the driest; for example, at Waco the rainfall amounts to 4.5 in.
The western part of the province is driest, as the rain clouds often pass over the lower levels but are caught by the eastern hills.
The winters are long and marked by exceedingly low temperatures, but as they are the driest season of the year, the extremes are not so disagreeable as they would be in a more humid region.
Nearly all the moisture that is precipitated during six or seven months is stored up in the form of snow, and is gradually diffused in the course of the succeeding summer; even in the hottest and driest seasons the reserves accumulated during a long preceding period of years in the form of glaciers are available to maintain the regular flow of the greater streams. Nor is this all; the lakes that fill several of the main valleys on the southern side of the Alps are somewhat above the level of the plains of Lombardy and Venetia, and afford an inexhaustible supply of water, which, from a remote period, has been used for that system of irrigation to which they owe their proverbial fertility.
More than half the rainfall occurs from July to November, the wettest month being September, with an average of 2.95 in.; the driest month is April, with an average of 1 14 in.
The narrow valleys between the hills are very fertile, having a rich soil and an abundant water-supply even in the driest seasons.
The north-east winds acquire their greatest frequency from March to June and in November, which are accordingly the driest portions of the year.
It thus happens that the driest climates in the east are those which have to south-westwards the broadest extent of mountainous ground, and that the wettest eastern climates are those which are least protected by high lands on the west.
The driest climates of the east are in Tweeddale about Kelso and Jedburgh, the low grounds of East Lothian, and those on the Moray Firth from Elgin round to Dornoch.
Cluny in the Grand Port (south-eastern) district has a mean annual rainfall of 145 in.; Albion on the west coast is the driest station, with a mean annual rainfall of 31 in.
The rods are reputed to be most durable when from the driest ground, and to be especially good where the bottom is chalky.
In the Western Division and along the south coast the driest month is usually April or May, while in the Eastern Division it is February or March.
It is equally satisfactory to know that there is a nearly constant ratio on any given area (exceeding perhaps 1000 acres) between the true mean annual rainfall, the rainfall of the driest year, the two driest consecutive years and any other groups of driest consecutive years.
Thus in any period of 50 years the driest year (not at an individual gauge but upon such an area) will be about 63% of the mean for the 50 years.
That in the three driest consecutive years will be about 80% of the mean for the 50 years.
That in the four driest consecutive years will be about 83% of themean for the 50 years.
That in the five driest consecutive years will be about 85% of the mean for the 50 years.
That in the six driest consecutive years will be about 862% of the mean for the 50 years.
Thus the benefit to the fisheries and to the riparian owners generally is beyond all question; but the cost to the water authority of conferring that benefit is also very great - commonly (according to the proportion of the natural flow intended to be rendered uniform) 20 to 35% of ' The volume of compensation water is usually fixed as a given fraction of the so-called " available supply " (which by a convention that has served its purpose well, is understood to be the average flow of the stream during the three consecutive driest years).
In conformity with the above-mentioned convention (by which compensation water is determined as a certain fraction of the average flow during the three driest consecutive years) the available supply or flow from a given area is still understood to be the average annual rainfall during those years, less the corresponding evaporation and absorption by vegetation.
If the reservoir were larger it might equalize the flow of the four or more driest consecutive years, which would be somewhat greater than that of the three; if smaller, we might only be able to count upon the average of the flow of the two driest consecutive years, and there are many reservoirs which will not yield continuously the average flow of the stream even in the single driest year.
Empirical rules have grown up assigning to each district, according to its average rainfall, a particular number of days' supply, independently of any inflow, as the contents of the reservoir necessary to secure a given yield throughout the driest seasons.
Similarly, the yield from any given reservoir, or the capacity required for any yield, corresponding with any mean rainfall from 30 to 100 in., and with the flow over any period, from the driest year to the six or more consecutive driest years, may be determined from the diagram.
It must also be remembered that the total capacity of a reservoir must be greater than its net available capacity, in order that in the driest seasons fish life may be maintained and no foul water may be drawn off.
This is especially important for legs as they tend to be one of the driest parts of the body.
Mountain areas of io,000 acres and upwards, largely covered with moorland, upon nearly imper meable rocks with few water-bearing fissures, yield in temperate climates, towards the end of the driest seasons, and therefore solely from underground, between a fifth and .a quarter of a cubic foot per second per 1000 acres.