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1.
Vaibhav A Mantri 《Journal of Earth System Science》2006,115(3):371-378
On 26th December 2004, the world witnessed the devastating power of tsunami, affecting many countries, bordering the Indian
Ocean region. This has caused significant changes in the shallow and intertidal regions of the Indian coast, especially the
Andaman and Nicobar Islands, Tamil Nadu, Kerala and Pondicherry. The baseline data on biomass availability and distribution
of benthic intertidal seaweed species were collected immediately after this catastrophic event by spot surveying 11 selected
localities of the above-mentioned regions. In all, 45 species belonging to 31 genera were recorded during the present survey,
the maximum number of seaweed species were recorded at Thirumullavarum, Kerala with the minimum at Car Nicobar, Andaman and
Nicobar Islands. A very different trend was observed in the case of biomass availability at some locations which was due to
the influence of habitat suitability over the tsunami damage. The details of this study have been provided in the present
communication 相似文献
2.
V. Sachithanandam T. Mageswaran R. Sridhar R. Purvaja R. Ramesh 《Natural Hazards》2014,72(2):1253-1258
Cyclonic storms are large-scale disturbances which cause extensive damage in coastal ecosystems. On 25 November 2013, Cyclone Lehar made a significant impact on the coastal areas of Andaman and Nicobar Islands. We observed the pre- and post-Lehar cyclonic effects on the seagrass meadows at Ross and Smith Island, North Andaman. The study indicates that the seagrass meadows are composed of Halodule uninervis, Halophila ovalis, Halodule pinnifolia and Thalassia hemperichii species. Seagrass beds of approximately 1.96 ha (approx. 63 %) were destroyed in the cyclone. 相似文献
3.
C SUDHAKAR REDDY SONALI SINGH V K DADHWAL C S JHA N RAMA RAO P G DIWAKAR 《Journal of Earth System Science》2017,126(1):8
This study was carried out to simulate the forest cover changes in India using Land Change Modeler. Classified multi-temporal long-term forest cover data was used to generate the forest covers of 1880 and 2025. The spatial data were overlaid with variables such as the proximity to roads, settlements, water bodies, elevation and slope to determine the relationship between forest cover change and explanatory variables. The predicted forest cover in 1880 indicates an area of 10,42,008 km2, which represents 31.7% of the geographical area of India. About 40% of the forest cover in India was lost during the time interval of 1880–2013. Ownership of majority of forest lands by non-governmental agencies and large scale shifting cultivation are responsible for higher deforestation rates in the Northeastern states. The six states of the Northeast (Assam, Manipur, Meghalaya, Mizoram, Nagaland, Tripura) and one union territory (Andaman & Nicobar Islands) had shown an annual gross rate of deforestation of >0.3 from 2005 to 2013 and has been considered in the present study for the prediction of future forest cover in 2025. The modelling results predicted widespread deforestation in Northeast India and in Andaman & Nicobar Islands and hence is likely to affect the remaining forests significantly before 2025. The multi-layer perceptron neural network has predicted the forest cover for the period of 1880 and 2025 with a Kappa statistic of >0.70. The model predicted a further decrease of 2305 km2 of forest area in the Northeast and Andaman & Nicobar Islands by 2025. The majority of the protected areas are successful in the protection of the forest cover in the Northeast due to management practices, with the exception of Manas, Sonai-Rupai, Nameri and Marat Longri. The predicted forest cover scenario for the year 2025 would provide useful inputs for effective resource management and help in biodiversity conservation and for mitigating climate change. 相似文献
4.
Some characteristics of very heavy rainfall over Orissa during summer monsoon season 总被引:1,自引:0,他引:1
Orissa is one of the most flood prone states of India. The floods in Orissa mostly occur during monsoon season due to very
heavy rainfall caused by synoptic scale monsoon disturbances. Hence a study is undertaken to find out the characteristic features
of very heavy rainfall (24 hours rainfall ≥125 mm) over Orissa during summer monsoon season (June–September) by analysing
20 years (1980–1999) daily rainfall data of different stations in Orissa. The principal objective of this study is to find
out the role of synoptic scale monsoon disturbances in spatial and temporal variability of very heavy rainfall over Orissa.
Most of the very heavy rainfall events occur in July and August. The region, extending from central part of coastal Orissa
in the southeast towards Sambalpur district in the northwest, experiences higher frequency and higher intensity of very heavy
rainfall with less interannual variability. It is due to the fact that most of the causative synoptic disturbances like low
pressure systems (LPS) develop over northwest (NW) Bay of Bengal with minimum interannual variation and the monsoon trough
extends in west-northwesterly direction from the centre of the system. The very heavy rainfall occurs more frequently with
less interannual variability on the western side of Eastern Ghat during all the months and the season except September. It
occurs more frequently with less interannual variability on the eastern side of Eastern Ghat during September. The NW Bay
followed by Gangetic West Bengal/Orissa is the most favourable region of LPS to cause very heavy rainfall over different parts
of Orissa except eastern side of Eastern Ghat. The NW Bay and west central (WC) Bay are equally favourable regions of LPS
to cause very heavy rainfall over eastern side of Eastern Ghat. The frequency of very heavy rainfall does not show any significant
trend in recent years over Orissa except some places in north-east Orissa which exhibit significant rising trend in all the
monsoon months and the season as a whole. 相似文献
5.
Age estimates of coastal terraces in the Andaman and Nicobar Islands and their tectonic implications
Kusala Rajendran C.P. Rajendran Anil Earnest G.V. Ravi Prasad K. Dutta D.K. Ray R. Anu 《Tectonophysics》2008,455(1-4):53-60
The great Indian Ocean earthquake of December 26, 2004 caused significant vertical changes in its rupture zone. About 800 km of the rupture is along the Andaman and Nicobar Islands, which forms the outer arc ridge of the subduction zone. Coseismic deformation along the exposed land could be observed as uplift/subsidence. Here we analyze the morphological features along the coast of the Andaman and Nicobar Islands, in an effort to reconstruct the past tectonics, taking cues from the coseismic effects. We obtained radiocarbon dates from coastal terraces of the island belt and used them to compute uplift rates, which vary from 1.33 mm yr− 1 in the Little Andaman to 2.80 mm yr− 1 in South Andaman and 2.45 mm yr− 1 in the North Andaman. Our radiocarbon dates converge on 600 yr and 1000 yr old coastal uplifts, which we attribute to the level changes due to two major previous subduction earthquakes in the region. 相似文献
6.
To image the electrical conductivity distribution, fluxgate magnetometers are operated at five sites in Andaman and Nicobar region. Transfer functions are estimated for the period range 8–128 min, from nighttime transient geomagnetic variations, using robust regression analysis. The observed induction arrows in Andaman Islands are found to point towards east despite deep sea located towards its west. This indicates that fore-arc basin (Andaman–Nicobar deep) is more conducting than the region of outer non-volcanic Island arc.Thin sheet model requires the conductance of 10,000–35,000 S (with increase conductivity towards the south) for explaining the observed induction pattern. The observed induction pattern at Andaman–Nicobar stations can be explained in terms of high conducting Cretaceous–Tertiary sediments filling the Andaman–Nicobar deep. High conductivity over Invisible bank has been attributed to the partial melts/volatile fluids derived from the subducting Indian plate that are intruding into the eastern margin of fore-arc basin through the West Andaman Fault (WAF).The induction pattern at Great Nicobar station (Campbell Bay) may be related to the highly conducting sediments filling the Mergui basin along with mafic intrusions. Also crustal transition occurs below the Mergui Terrace at the Malayan coast contributing to the enhanced conductivity anomaly. 相似文献
7.
D. R. Pattanaik 《Natural Hazards》2007,40(3):635-646
Between 1941 and 2002 there has been a decreasing trend in the frequency of monsoon disturbances (MDs) during the summer monsoon
season (June–September). This downwards trend is significant at the 99.9% level for the main monsoon phase (July–August) and
the withdrawal phase (September); however, it is not significant during the onset phase (June). The variability in rainfall
over the homogeneous regions of India on the sub-seasonal scale also shows a significant decreasing trend with respect to
the amount of rainfall over Northwest India (NWI) and Central India (CEI) during all three phases of the monsoon. Meteorological
observations reveal that there has been an eastward shift of the rainfall belt with time over the Indian region on the seasonal
scale and that this shift is more prominent during the withdrawal phase. This decreasing trend in MDs together with its restricted
westerly movement seem to be directly related to the decreasing trend in rainfall over CEI during both the main monsoon and
withdrawal phases and over NWI during the withdrawal phase. The low-level circulation anomalies observed during two periods
(period-I: 1951–1976; period-ii: 1977–2002) are in accordance with the changes in rainfall distribution, with comparatively
more (less) rainfall falling over NWI, CEI and Southern Peninsular India (SPI) during period-I (period-ii), and are accompanied
by a stronger (weaker) monsoon circulation embedded with an anomalous cyclonic (anti-cyclonic) circulation over CEI during
the main monsoon and withdrawal phases. During the onset phase, completely opposite circulation anomalies are observed during
both periods, and these are associated with more (less) rainfall over NWI, CEI and SPI during period-ii (period-I). 相似文献
8.
利用1960—2017年日降水量资料,采用线性倾向趋势分析、滑动分析和泰森多边形法等,对河西地区多年降水时空变化特征及不同量级降水日数及降水强度的变化趋势进行了研究。结果表明:河西地区年均降水量为99.0 mm,呈现明显的逐年上升趋势,平均倾向率为8.72 mm?(10a)-1,月降水量为单峰分布,5—10月夏秋汛期降水量占年降水量的89.2%,各季节降水量均呈现显著上升趋势;年均降水日数为36.7天,呈现明显的上升趋势,增幅为3.18 d?(10a)-1,降水日数主要分布在夏季,约占总降水日数的54.6%;平均降水强度为2.70 mm?d-1,呈现减弱趋势,变化速率为-0.04 mm?d-1?(10a)-1;零星小雨和小雨降水日数均呈现增加趋势,而二者平均降水强度均为下降趋势,小到中雨降水日数和降水强度呈现增加趋势,中雨及以上的降水变化趋势不明显。 相似文献
9.
The summer monsoon rainfall over Orissa, a state on the eastern coast of India, is more significantly related than Indian
summer monsoon rainfall (ISMR) to the cyclonic disturbances developing over the Bay of Bengal. Orissa experiences floods and
droughts very often due to variation in the characteristics of these disturbances. Hence, an attempt was made to find out
the inter-annual variability in the rainfall over Orissa and the frequencies of different categories of cyclonic disturbances
affecting Orissa during monsoon season (June–September). For this purpose, different statistical characteristics, such as
mean, coefficient of variation, trends and periodicities in the rainfall and the frequencies of different categories of cyclonic
disturbances affecting Orissa, were analysed from 100 years (1901–2000) of data. The basic objective of the study was to find
out the contribution of inter-annual variability in the frequency of cyclonic disturbances to the inter-annual variability
of monsoon rainfall over Orissa.
The relationship between summer monsoon rainfall over Orissa and the frequency of cyclonic disturbances affecting Orissa shows
temporal variation. The correlation between them has significantly decreased since the 1950s. The variation in their relationship
is mainly due to the variation in the frequency of cyclonic disturbances affecting Orissa. The variability of both rainfall
and total cyclonic disturbances has been above normal since the 1960s, leading to more floods and droughts over Orissa during
recent years. The inter-annual variability of seasonal rainfall over Orissa and the frequency of cyclonic disturbances affecting
Orissa during monsoon season show a quasi-biennial oscillation period of 2–2.8 years. There is least impact of El Nino southern
oscillation (ENSO) on inter-annual variability of both the seasonal rainfall over Orissa and the frequencies of monsoon depressions/total
cyclonic disturbances affecting Orissa. 相似文献
10.
南京市强降水天气长期动态及变异性规律 总被引:1,自引:0,他引:1
基于南京市1951~2016年汛期(6~9月)各月降水资料,分析研究区强降水天气的长期动态及变异性规律。长期动态结果表明,近66年来南京市强降水天气发生频率显著增加,平均每10年增加0.31次;不同规模强降水中,暴雨、大暴雨天气发生频率均呈增加趋势,其中暴雨天气呈显著增加。多年(7a、10a、15a)月际排序值滑动标准差均通过置信度99%显著性检验,强降水天气变异性呈显著下降趋势;强降水天气汛期盛行月份趋于集中(7月),月间格局趋于稳定,与多年的月际排序值滑动标准差得出强降水天气变异性呈下降趋势的结论相吻合。 相似文献
11.
K. Ilayaraja R. R. Krishnamurthy M. Jayaprakash P. M. Velmurugan S. Muthuraj 《Environmental Earth Sciences》2012,66(8):2459-2476
The large tsunami, which was generated by an earthquake on 26 December 2004, affected most of the countries around the Indian Ocean. A total of 48 tsunamigenic surface sediments and nine core samples have been collected from various coastal geomorphological features such as beaches, estuaries/creeks and mangrove areas in the Andaman Islands. These samples were analysed for textural analysis and geochemical studies to evaluate effects of the tsunami on sediment contamination. The studied sediments, deposited by the 26 December 2004 tsunami in Andaman group of islands, belong to poorly sorted, coarse to medium sands. Generally the concentration of heavy metals in the tsunamigenic surface sediments is mainly in the order of Cu > Mn > Fe > Zn > Pb during the post-tsunami (2005) and Cu > Fe > Mn > Zn > Pb during the post-monsoon (2008). The analysed core samples show that tsunami sediments have been preserved at certain depths from the sampling locations and indicate that they were derived from shallow littoral to neritic depths. The approximate width of deposits deposited by the 26 December 2004 Tsunami in Diglipur and Mayabandar areas (North Andaman) is ~10 cm, in Rangat and Baratang (Middle Andaman) the thickness of the deposits is ~15 cm. In Chidiyatapu, Junglighat, Rutland Islands and Havelock Island (South Andaman) the thickness of the deposits is ~30, ~8, ~25 and ~5 cm, respectively, and in Hut Bay (Little Andaman) the thickness of the deposits is about ~15 cm. 相似文献
12.
Aftab Alam Khan 《Natural Hazards》2012,61(3):1127-1141
Geodynamic status, seismo-tectonic environment, and geophysical signatures of the Bay of Bengal do not support the occurrence
of seismogenic tsunami. Since thrust fault and its intensity and magnitude of rupture are the key tectonic elements of tsunamigenic
seismic sources, the study reveals that such characteristics of fault-rupture and seismic sources do not occur in most of
the Bay of Bengal except a small segment in the Andaman–Nicobar subduction zone. The inferred segment of the Andaman–Nicobar
subduction zone is considered for generating a model of the deformation field arising from fluid-driven source. The model
suggests local tsunami with insignificant inundation potential along the coast of northern Bay of Bengal. The bathymetric
profile and the sea floor configuration of the northern Bay of Bengal play an important role in flattening the waveform through
defocusing process. The direction of motion of the Indian plate makes an angle of about 30° with the direction of the opening
of Andaman Sea. The opening of Andaman Sea and the direction of plate motion of the Indian plate results in the formation
of Andaman trench where the subducting plate dives more obliquely than that in the Sunda trench in the south. The oblique
subduction reduces significantly the possibilities of dominant thrust faulting in the Andaman subduction zone. Further, north
of Andaman subduction in the Bengal–Arakan coast, there is no active subduction. On the otherhand, much greater volume of
sediments (in excess of 20 km) in the Bengal–Arakan segment reduces the possibilities of mega rupture of the ocean floor.
The water depth (≈1,000 m) along most of the northern Bay of Bengal plate margin is not optimum for any significant tsunami
generation. Hence, very weak possibility of any significant tsunami is suggested that based on the interpretation of geodynamic
status, seismo-tectonic environment, and geophysical signatures of the Andaman subduction zone and the Bengal–Arakan coast. 相似文献
13.
Rainfall is one of the pivotal climatic variables, which influence spatio-temporal patterns of water availability. In this study, we have attempted to understand the interannual long-term trend analysis of the daily rainfall events of ≥?2.5 mm and rainfall events of extreme threshold, over the Western Ghats and coastal region of Karnataka. High spatial resolution (0.25°?×?0.25°) daily gridded rainfall data set of Indian Meteorological Department was used for this study. Thirty-eight grid points in the study area was selected to analyze the daily precipitation for 113 years (1901–2013). Grid points were divided into two zones: low land (exposed to the sea and low elevated area/coastal region) and high land (interior from the sea and high elevated area/Western Ghats). The indices were selected from the list of climate change indices recommended by ETCCDI and are based on annual rainfall total (RR), yearly 1-day maximum rainfall, consecutive wet days (≥?2.5 mm), Simple Daily Intensity Index (SDII), annual frequency of very heavy rainfall (≥?100 mm), frequency of very heavy rainfall (≥?65–100 mm), moderate rainfall (≥?2.5–65 mm), frequency of medium rainfall (≥?40–65 mm), and frequency of low rainfall (≥?20–40 mm). Mann-Kendall test was applied to the nine rainfall indices, and Theil-Sen estimator perceived the nature and the magnitude of slope in rainfall indices. The results show contrasting trends in the extreme rainfall indices in low land and high land regions. The changes in daily rainfall events in the low land region primarily indicate statistically significant positive trends in the annual total rainfall, yearly 1-day maximum rainfall, SDII, frequency of very heavy rainfall, and heavy rainfall as well as medium rainfall events. Furthermore, the overall annual rainfall strongly correlated with all the rainfall indices in both regions, especially with indices that represent heavy rainfall events which is responsible for the total increase of rainfall. 相似文献
14.
Neeraj Awasthi Jyotiranjan S. Ray Amzad H. Laskar Madhusudan G. Yadava 《Journal of the Geological Society of India》2013,82(1):59-66
Major earthquakes that trigger tsunamis are great natural hazards. The devastations caused by the December 26, 2004 Sumatran earthquake, and the March 11, 2011 Japan earthquake, and associated tsunamis will remain in our memories for a long time. Such events reaffirm the need for studying the cause and effects of large earthquakes of the past and to prepare the world better for the future. In such an effort, to understand the pattern of earthquakes and their effects on the geomorphic evolution, we have studied deformation history in the Andaman and Nicobar Islands, located in one of the most active convergent margins of the world. Focusing on tectonically formed coastal terraces and determining the timing of their formation from the exposed dead corals, we have been able to reconstruct the history of major earthquakes in these islands for the last 40 kyr. Our results in conjunction with the existing radiocarbon age data from coastal terraces of these islands appear to suggest that the frequency of major earthquakes (M > 7) in the region has increased during the last 9 kyr. In confirmation with some earlier work, we find evidences for a major earthquake and a tsunami between 500-600 cal yr BP and possibly 4 others during 6–9 cal kyr BP. Our results also indicate that there has been a continuous subsidence of the south Andaman Islands. 相似文献
15.
Spatial variability of aridity over northern India (north of 20°N) is studied by examining variations in the arid area. Area with an objectively determined summer monsoon rainfall (June to September total) of less than 500 mm is identified as arid area. The summer monsoon rainfall of 212 rain-gauges from 212 districts of the region for the period 1871–1984 are used in the analysis. An interesting feature of the arid area series is that it shows decreasing trend from beginning of the present century. The summer monsoon rainfall fluctuations over five subjectively divided zones over northern India are examined to understand the association between rainfall and the arid area variations. The rainfall series for northwest India shows a significant increasing trend and that for northeast India a significant decreasing trend from the beginning of this century. Rainfall fluctuations over the remaining zones can be considered intermediate stages of a systematic spatial change in the rainfall pattern. This suggested that the recent decreasing trend in the arid area is due to a westward shift in the monsoon rainfall activities. From correlation analyses it is inferred that perhaps the recent decreasing trend in the arid area and increasing trend in the monsoon rainfall over northwest India are associated with a warming trend of the northern hemisphere. 相似文献
16.
Renjith VishnuRadhan Divya David Thresyamma Kamal Sarma Grinson George Prabhakar Shirodkar Ponnumony Vethamony 《Natural Hazards》2015,78(1):309-331
During the last decade, the Andaman and Nicobar Islands (ANI) have witnessed a marginal population growth with associated variations and degradation in the water quality of the inhabited coastal region. Monthly water quality data collected from six coastal locations in ANI were used to evaluate the anthropogenic influence in an otherwise pristine island environment. Exceptionally low dissolved oxygen (0.7–2.0 mg/L) at the Phoenix Jetty (PJ) and mangrove site indicates hypoxic conditions. Among the nutrients, nitrate shows high values at PJ due to heavy nutrient loading from domestic sewage. The cluster analysis segregated PJ from the remaining sites, indicating deterioration in the water quality. On the other hand, water quality at Sippighat, a low-intensity aquaculture site, does not indicate any deterioration. Apart from the large modulations in the water quality of the study area by the Bay of Bengal waters, the effect of domestic waste discharges significantly affects the coastal waters of Andaman. Though the present water quality at most of the study sites appears acceptable, the increased volume of tourism and allied activities poses a potential threat to the island ecosystem. Besides the anthropogenic influences, the long-term trends in oceanographic factors were analyzed in order to decipher the expected natural effect on future water quality of the region. Based on the increasing sea surface temperature as well as the decreasing chlorophyll-a, eddy kinetic energy, and zonal kinetic energy, we propose that the combined effect of both natural and anthropogenic factors can ultimately distress the present ambient water quality of ANI. 相似文献
17.
Using multibeam swath bathymetric survey, a moderate sinuosity meandering channel was identified in the West Basin which is extending up to the northwestern corner of the Alcock Rise. Detailed morphometric analysis indicates that this channel is a mature sinuous channel which acts as a major conduit for the sediments into the West Basin. The straight length of the channel is ~70 km with an axial length of ~85 km. Furthermore, the maximum width is 1.5 km and minimum width is 0.4 km with an average sinuosity value of ~1.16, indicating its moderate meandering nature. It is interesting to note that this channel lacks the physical connection with the continental slope of the Andaman and Nicobar Islands. From multibeam data, the channels seem to emerge from Andaman Island; by using GIS techniques, a derived channel network system is obtained to identify the source, which reveals that its exact source is the Irrawaddy Delta system. Furthermore, this study even suggests that the major contribution of modern sediments to the Andaman Fore Arc basin is from Irrawaddy Delta, and sediment supply from Andaman continental slope also played an important role. 相似文献
18.
HarshGupta 《《幕》》2005,28(1):2-5
The 26th December 2004 earthquake of Mw 9.3 is the second largest earthquake ever to have been recorded.This generated a tsunami which affected several Asian countries. In India, the Andaman & Nicobar group of islands, and coastal states of Tamil Nadu, Andhra Pradesh and Kerala were severely affected. Here, we briefly provide an outline of the approach taken by India for an early warning system for mitigation of oceanogenic disasters. 相似文献
19.
A. C. Narayana 《Natural Hazards》2011,57(1):65-82
Geomorphic features associated with earthquakes and tsunamis have received wide attention in estimating uplift and subsidence
after the tectonic event. Although various techniques are in vogue in estimating the uplift and subsidence after the 2004
Andaman-Sumatra earthquake and subsequent tsunami, remote sensing techniques have been proved to be quite handy to study the
geomorphic changes. In the present study, geomorphic changes associated with the destructive event of December 2004 have been
analyzed. The emergent and subsident coasts around the smaller islands in the Andaman region have been identified. The coral
reef area that has been subjected to uplift or subsidence in some of the islands of the Andaman and Nicobar region is delineated,
and the net areal extents of these coral beds have been computed. Of the six islands studied in Andaman region, coral reef
of four islands was subjected to uplift, and around two islands the area was subsided. The uplifted area varied from 0.10
to 11 km2, and subsidence was about 0.50 km2. In Nicobar region, the subsidence of coral reefs was recorded. This study helps to monitor the coastal environments and
the destruction due to natural hazards. 相似文献
20.
Between 2008 and 2010, the island of Majorca (Spain) experienced the coldest and wettest winters of the last 40 years. Accumulated rainfall was twice the average and values of intense rainfall up to 296 mm/24?h were recorded, very similar to those calculated for a return period of 100 years. Additionally, high precipitation coincided with anomalous, low temperatures, with abundant snowfall and freezing in the highest zones of the Tramuntana Range, in the northwest sector of the island. As a result, 34 mass movements were recorded on the range, which seriously affected the road network in an area of great importance for tourism, as it welcomes 8.5 million visitors each year. Fourteen rockfalls, 1 rock avalanche, 15 landslides and 4 karstic collapses were inventoried. The geological structure, formed by a series of NW overlapping thrusts, determines the distribution as well as the failure pattern of the movements. Thus, the northern face of the range registered 68% of the mass movements: nine rockfalls with planar failure took place as well as all the landslides recorded. Likewise, south-facing slopes have been affected by longer runout rockfalls with a wedge-type failure. The thorough analysis of the meteorological data shows that most of the movements have taken place after antecedent rainfall over 800?mm. Additionally, the rockfalls have also occurred after several freeze–thaw cycles, being a determining and unusual factor in this warm region. Intense rainfall >90 mm/24?h also caused rockfalls as well as exceptional very intense rainfall >120 mm/24?h caused landslides. The results aim to contribute to the design of an early warning system coordinating emergency, infrastructure services and meteorological centres in a region of high risk. 相似文献