scholarly journals Analysis of flash flood regimes in the North-Western and South-Eastern Mediterranean regions

2012 ◽  
Vol 12 (5) ◽  
pp. 1255-1265 ◽  
Author(s):  
P. Tarolli ◽  
M. Borga ◽  
E. Morin ◽  
G. Delrieu

Abstract. This work analyses the prominent characteristics of flash flood regimes in two Mediterranean areas: the North-Western Mediterranean region, which includes Catalonia, France and Northern Italy, and the South-Eastern Mediterranean region, which includes Israel. The two regions are characterized by similarities in the hydro-meteorological monitoring infrastructure, which permits us to ensure homogeneity in the data collection procedures. The analysis is articulated into two parts. The first part is based on use of flood peak data, catchment area and occurrence date for 99 events (69 from the North-Western region and 30 from the South-Eastern region). Analysis is carried out in terms of relationship of flood peaks with catchment area and seasonality. Results show that the envelope curve for the South-Eastern region exhibits a more pronounced decreasing with catchment size with respect to the curve of the North-Western region. The differences between the two relationships reflect changes in the effects of storm coverage and hydrological characteristics between the two regions. Seasonality analysis shows that the events in the North-Western region tend to occur between August and November, whereas those in the South-Eastern area tend to occur in the period between October and May, reflecting the relevant patterns in the synoptic conditions leading to the intense precipitation events. In the second part, the focus is on the rainfall-runoff relationships for 13 selected major flash flood events (8 from the North-Western area and 5 from the South-Eastern area) for which rainfall and runoff properties are available. These flash floods are characterised in terms of climatic features of the impacted catchments, duration and amount of the generating rainfall, and runoff ratio. Results show that the rainfall duration is shorter and the rainfall depth lower in the South-Eastern region. The runoff ratios are rather low in both regions, whereas they are more variable in the South-Eastern area. No clear relationship between runoff ratio and rainfall depth is observed in the sample of floods, showing the major influence of rainfall intensity and the initial wetness condition in the runoff generation for these events.

1869 ◽  
Vol 6 (58) ◽  
pp. 167-173
Author(s):  
Henry Alleyne Nicholson

In the former portion of this paper, the Tipper or south-eastern boundary of the Skiddaw Slates, in their main area, had been traced from Troutbeck, on the N.E., as far as the head of Buttermere, onthe S.W. From this point (i.e. the north-western end of Honister Crag), the Skiddaw Slates can be traced for a very short distance across Warnscales Bottom. They are still overlaid by the felspathic trap and succeeding band of slates and breccias, which together compose Fleetwith Pike and the S.E. end of Honister Crag, and the relations between the two formations are the same as in the Gatescarth Valley. When however the pass of Scarf Gap on the south-west of Warnscales is reached, the Skiddaw Slates have disappeared and the base of the Green Slate Series now rests upon a great mass ofiatrusive felstone-porphyry (here almost a true syenite) which forms High Crag and High Stile. Though the Skiddaw Slates are absent here, it is interesting to observe that the stratification of the Green Slate Series can be particularly well made out in this region. The rugged hills to the S.E. of Scarf Gap are occupied by a prolongation of the great slaty band of Honister, but the beds have now to a great extent lost their former character, and have assumed very much the mineral aspect of trap, from which however they are easily distinguished by the fact that the bedding, in spite of a rough but well marked cleavage, is unusually distinct. The strata displayed in a number of magnificently moutonné'd crags and bosses, in which they are seen to undulate repeatedly, forming a series of small but well-preserved anticlinals and synclinals, the dips of which are N.N.W. and S.S.E. at angles of from 25° to 35°. The inclination therefore of these beds is only about half as high as that of the Skiddaw Slates in the Gatescarth Valley.


2019 ◽  
Vol 7 (5) ◽  
Author(s):  
Anthony John Ilozobhie ◽  
Dominic Akam Obi

The distribution of Formation Temperature of the Fika Shale Formation within part of Borno basin from five wireline logs was investigated.  The area under studied covered about 20 by 40 kilometre square of the total land mass of the basin. The Fika shale sequence were identified at 865m to 1795m in Kinasar well, 640m to 1990m in Krumta, 980m to 1620m in Masu, 700m to 2710m in Tuma, 710m to 2220m in Wadi. The plot of the entire Formation Temperature of the study area reveals remarkable steep variations in temperature with increased range from 680C to 1280C starting from the southern eastern region to the north western region. This is possibly due to substantial temperature enhancing effects of the underlying basement complex. Interestingly, it was also observed that the minimal temperature variation occurred approximately 20C/ meter across the field and this also lays credence to the fact that the notable subsurface geothermal variation may be recent events initiated by the near- surface magmatic intrusive events which may have had adverse effects on the overlying sedimentary cover. Furthermore, it was deduced that the probability of hydrocarbon accumulation is better in the south eastern region than the north western region although the steep temperature variation of 20C/ meter within some part of the study area may perhaps reduce this possibility.


2021 ◽  
Vol 17 (2) ◽  
pp. 387-402
Author(s):  
Anar Mirsamid Agalarzade

The paper deals with the results of excavations carried out in recent years in the Early Bronze Age kurgans in the mountainous part of the south-eastern region of Azerbaijan. It has been determined that there are several types of burial customs of this period in these small kurgans located on the Komani plateau between Kurekchi and Arvana villages of Yardimly district, on the Azerbaijan - Iran border. Although the Early Bronze Age Telmankend kurgans were excavated in the foothills of the region in the 1960s, such monuments were not excavated or even registered in the highlands. at these grave monuments, which were first discovered by us in the summer pastures in 2014, archaeological excavations began in 2018, and four kurgans were excavated here. Komani kurgans, built at an altitude of 2000 m above sea level, are important in terms of studying the burial customs of the Early Bronze Age semi-nomadic cattle-breeding population. Excavations of Komani kurgans have revealed that the high mountainous area of the south-eastern region of Azerbaijan had been used by the cattle-breeding population since the Early Bronze Age, where they were engaged in seasonal farming and carried out their burials. The lack of grave goods during the burial is explained by their temporary residence in the summer pastures. Undoubtedly, the presence of short-term settlements of cattle-breeding tribes near the kurgans is no exception. Building of Early Bronze Age Komani kurgans in the afore-said area from the chronological viewpoint is distinguished due to their small size. As for the later stages of the Bronze Age, dozens of big kurgans can be found here. However, no archeological excavations have been carried out in any of them so far. Similar burial customs and materials of Komani kurgans are mostly found in the Early Bronze Age monuments of Nakhchivan. Similar burials can be found in other coeval grave monuments of Azerbaijan and in the north-eastern provinces of Iran.


1986 ◽  
Vol 49 (1) ◽  
pp. 8-24 ◽  
Author(s):  
R. M. Burrell

When Kipling published that aptly-named poem ‘Arithmetic on the Frontier’ in 1886 his use of the term ‘jezail’ was no more literary device, for the tribesmen of the north-western borderlands were then armed with locally made, muzzle-loading, smooth-bore muskets. A decade later a few European breech-loading rifles began to appear, and by 1907 the military intelligence department estimated that over a quarter of those tribesmen had acquired a modern weapon. It was the Government of India's wish to halt that flow of arms which led to a British naval blockade of the south-eastern coast of Persia from 1909, and the landing of troops in Makrāan during 1910 and 1911.


2017 ◽  
Vol 30 (3) ◽  
pp. 259 ◽  
Author(s):  
Richard W. Jobson ◽  
Paulo C. Baleeiro ◽  
Markus S. Reut

Phylogenetic relationships among all of the 47 recognised species and 10 putative new taxa of Utricularia subgenus Polypompholyx, were assessed using maximum parsimony and Bayesian inference analyses of DNA sequences representing the plastid rps16 intron, trnL–F intron and spacer regions and the trnD–T intron. We found strong jackknife and posterior-probability support for a monophyletic subgenus Polypompholyx and a sister relationship between the sections Polypompholyx+Tridentaria and Pleiochasia. Within the section Pleiochasia, are two well-supported major clades, each containing three supported clades. Our S-DIVA biogeographic analysis, using five major Australian drainage basins and New Zealand as geographic areas, estimated two early vicariance events between south-western and north-western mainland regions, corresponding with known periods of increased aridity at 15 and 6million years ago. Subsequent dispersal events were estimated between northern and south-eastern Australia, with recent dispersal of species from south-western regions to the south-east and New Zealand occurring between 4million and 1million years ago. There were 28 speciation events inferred within the north-western region, followed by 9 for the south-western and south-eastern regions, indicating that the north-western monsoonal savanna habitats are a biodiversity hotspot for the lineage. We also show the evolutionary shifts in growth habit, and show that lifecycle corresponds strongly with shifts in seasonality between temperate and monsoonal regions. On the basis of our molecular phylogenetic results and morphology, we here designate a new sectional ranking for subgenus Polypompholyx.


1921 ◽  
Vol 58 (2) ◽  
pp. 74-80
Author(s):  
H. Preiswerk

THE oil-springs of Jaba are situated at the foot of the steep lime stone hills 1½ or 2 miles distant from the village of Jaba and 7 miles from the railway station of Massan. On the topographical map (Sheet 38, p. 9, scale 1 inch = 1 mile) the two main oil-springs are marked. The north-western spring is called Chota Kutta by the natives, the south-eastern Burra Kutta, from the brooks where they are found.


2018 ◽  
Vol 40 (2) ◽  
pp. 63-85 ◽  
Author(s):  
L. Shumlyanskyy ◽  
L. Stepanyuk ◽  
S. Claesson ◽  
K. Rudenko ◽  
A. Bekker

2016 ◽  
Vol 10 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Aliyu Muhammad ◽  
Mohammed Ibrahim ◽  
Ochuko Erukainure ◽  
Nathan Habila ◽  
Aimola Idowu ◽  
...  

2020 ◽  
Vol 7 (03) ◽  
Author(s):  
PREM K. SUNDARAM ◽  
BIKAS SARKAR ◽  
PAWAN JEET ◽  
SANJAY KUMAR PATEL ◽  
ANUKUL P ANURAG ◽  
...  

The production levels of agriculture have remained low in eastern region of India mainly due to lack of location-specific production technologies, natural calamities like floods, water logging, drought, inadequate timely supply of critical inputs and social constraints. Bihar is one of the important agrarian states of Eastern India. The crop yields are low and almost stagnating in Bihar compared to the north-western and other parts of the country. To improve the productivity in this region mechanization of farms is of critical importance. The farm power availability in Bihar in 2017 is 2.80 kW/ha and is more than the national average of 2.03 kW/ha. Still there are 14 districts in Bihar which is below national average. The number of marginal farmers has increased from 84.18 to 91.21 during 2014-17, an increase of 7.03 percent. Increase in Small and fragmented land will further hindrance the farm mechanization process. The present study was conducted to understand dynamics of farm power availability in Bihar, so as to take substantial measures for improved mechanization and in turn crop productivity in the region.


Sign in / Sign up

Export Citation Format

Share Document