Showing posts with label Big Risk to Water Security. Show all posts
Showing posts with label Big Risk to Water Security. Show all posts

Saturday, August 2, 2014

World Heritage Sites - Ellora Caves

Ellora Caves (1983), Maharashtra

The Ellora caves, locally known as ‘Verul Leni’ is located on the Aurangabad-Chalisgaon road at a distance of 30 km north-northwest of Aurangabad, the district headquarters. The name Ellora itself inspires everyone as it represents one of the largest rock-hewn monastic-temple complexes in the entire world. Ellora is also world famous for the largest single monolithic excavation in the world, the great Kailasa (Cave 16). The visit to these caves is enjoyed maximum during monsoon, when every stream is filled with rainwater, and the entire environ is lush green. The monsoon is not only a season of rains in this part, the local visitors are attracted to visit these ideal locations to have a glimpse of the mother nature in full bloom.

The caves are hewn out of the volcanic basaltic formation of Maharasthra, known as ‘Deccan Trap’, the term trap being of Scandinavian origin representing the step like formation of the volcanic deposits. The rock formation, on weathering has given rise to the appearance of terraces with flat summits. At Ellora, one can also have a glimpse of the channels (near Cave 32) through which the volcanic lava once flowed. These channels, due to overheating, have a characteristic brownish red colour. Similar rock was used in the construction of the Grishneshwar Temple nearby and also utilised for the flooring of the pathways at Bibi-ka-Maqbara.

The hills in which the caves are hewn, forms part of the Sahyadri ranges of the Deccan and dated to the Cretaceous era of the Geological time scale (about 65 million years ago). The hills rise abruptly from the surrounding plains on the south and west, the western surface being extensively utilised for hewing the cave complexes. The hill also supports several streams, the prominent among them being the Elaganga, which drains into the Shiv, a stream of the Godavari river system. The Elaganga is in its full vigour during the monsoon, when the overflowing waters of a barrage in the upstream near Mahismati allows the gushing waters to land at “Sita-ki-nahani” near Cave 29 as a crashing waterfall.

The volcanic lava flowed during different periods, gave rise to extensive horizontal flows alternating with vesicular trap beds. The vesicular traps formed the upper portion of each of the massive trap beds. The different lava flows also gave rise to vertical as well as horizontal joints in the rock formation. Depending upon the nature and mineralogical content of the lava flow, the rock formations also varied in character and texture, giving rise to various qualities like coarse grained, fine grained formations. The ancient builders at Ellora, like other places, particularly chose the fine grained formations of the Deccan trap, ideal for sculpting and rock hewing. In addition to this, the ancient builders also traced the horizontal and vertical joints in the rock formation to minimise the labour and time during excavation and rock splitting. The basaltic rock is also ideal for rock hewing, as they are soft during the initial excavation and hardens on exposure to environment.

The basaltic formation of the Deccan is ideal for rock hewing, the technique widely understood during ancient times. This induced the religious followers of various creeds to establish their settlements in them. By a rough estimate, there are nearly 1200 caves of varying sizes in the entire Maharashtra, out of which nearly 900 alone belong to Buddhism.

The region is also famous for its antiquity. It has been inhabited since time immemorial, the stone tools belonging to the Upper Palaeolithic (around 10,000 to 20,000 years ago), Mesolithic (less than 10,000 years ago) bearing testimony to this fact. The Chalcolithic remains (2500-1000 BC) in the vicinity also indicates the continuity of human occupation in this region.

The importance of Ellora during the early centuries of the Christian era is also understood by the findings of coins of Satavahanas, the ruling dynasty during the period. The Satavahanas had their capital at Pratishtana (modern Paithan) and ruled the entire area between the Arabian Sea and Bay of Bengal and bordered by the Narmada River on the north. Ellora being located on the ancient trade route connecting the western ports on the Arabian sea like Sopara (Surparaka, the Supara of Greek; Subara of Arab writers; the ancient capital of northern Konkan), Kalyan a thriving port; Chemula, the Samylla of Greek geographers, Chemula of Silaharas, on the island of Trombay and the inland cities like Paithan (Pratishtana), Ter (Tagara), Bhokardan (Bhogavardhana) etc. The fact that Satavahanas traversed this region is attested by their inscriptions at Nasik caves and donor inscriptions of their times at Pital Khora caves, located at a distance of 40 km west of Ellora. Ellora is located directly on the ancient trade route which traversed from Pratishtana via Aurangabad, Ellora, Pital Khora, Patne, Nasika (modern Nasik). Nasik is at the crossroads of an ancient trade route connecting centres on the west to east and those on the north to south.

The location on the ancient trade route did not induce any activities at Ellora during the Satavahana rule. Brisk activities were already on at nearby Pital Khora, Nasik, Ajanta, etc., and this could have been a diversion of the ancient builders to support any activity here. However, as the multiplication of the religious establishments took place in every nook and corner of Maharashtra, the ideal location of Ellora was unavoidable.

Thus grew one of the largest cave excavations at Ellora, that too of three different religious creeds, viz., Buddhism, Brahmanism and Jainism. The caves are datable from circa 6th - 7th century A.D. to 11th - 12th century A.D. In total, there are nearly 100 caves in the hill range out of which 34 caves are famous and visited by many tourists, out of which Caves 1 to 12 are Buddhist; Caves 13 to 29 are Brahmanical and Caves 30 to 34 are Jaina. Two more groups of caves are noticed on the Elaganga and on an upper terrace, namely, the Ganesh Leni and Jogeshwari Leni.

These religious establishments could have received royal patronage from various dynasties, even though inscriptional evidences are lacking for most of them. The only definite inscriptional evidence is that of Rashtrakuta Dantidurga (c. 753-57 A.D.) on the back wall of the front mandapa of Cave 15. The Great Kailasa (Cave 16) is attributed to Krishna I (c. 757-83 A.D.), the successor and uncle of Dantidurga. A copper plate grant from Baroda of the period of Karka II (c. 812-13 A.D.) speaks about the greatness of this edifice. The inscription tells us that this great edifice was built on a hill by Krishnaraja at Elapura (Ellora) and even the celestial beings moving in the sky were struck by its magnificence, as though it was self-existent, not created by mortals, and, even the architect who caused it was wonder struck that he could build it. Apart from the above two inscriptions, the entire cave complexes lack inscriptions of the nature found at other cave sites like that of Ajanta, Nasik, Karle, Kanheri, etc.

In the absence of concrete inscriptional evidence, we can deduce the royal dynasties that could have extended their patronage to the religious establishments. The initiation of religious establishments at Ellora coincides with the departure of the tradition at Ajanta. It is well known that the excavations started here before the Rashtrakutas arrived on the scene and the Caves 1 to 10 and Cave 21 (Ramesvara) were definitely constructed before them. These excavations are generally attributed to the Kalachuris of Mahismati, appeared to have gained control of the region around Nasik and parts of ancient Asmaka (region around Aurangabad) including Bhogavardana (modern Bhokardan) and the Chalukyas of Badami who held their sway in this region for a brief period before their feudatories, the Rashtrakutas took over.

The majority of the Brahmanical establishments and the remaining Buddhist ones can be attributed to the Rashtrakuta times which indicate the religious tolerance of the contemporary period. The Jaina caves definitely post-date the Rashtrakutas as indicated by the style of execution and fragmentary inscriptions. This region was under the control of Kalyani Chalukyas and Yadavas of Deogiri (Daulatabad) during this period. The patronage towards Jainism under the Yadavas is also known by the findings of several sculptures of Jaina faith from Daulatabad. Thus, we have the greatest religious conglomeration at a single place, signifying the religious tolerance and solidarity of different faiths.

The Ellora caves, unlike Ajanta, have a distinction that they were never lost to oblivion, due to their close proximity to the trade route. There have been numerous written records to indicate that these caves were visited regularly by enthused travellers and royal personages as well. The earliest is that of an Arab geographer Al-Mas‘udi of the 10th century A.D. In 1352 A.D. the approach roads to the caves were repaired on the ensuing visit of Sultan Hasan Gangu Bahmani, who also camped at the site and visited the caves. The other important accounts of these caves are by Firishta, Thevenot (1633-67), Niccolao Manucci (1653-1708), Charles Warre Malet (1794), Seely (1824). During the 19th century A.D. these caves were owned by the Holkars of Indore who auctioned for the right of worship and leasing them for religious as well as a form of entrance fee. After the Holkars, these caves passed into the control of Nizams of Hyderabad, who through their Archaeology Department carried out extensive repairs and maintenance of the caves under the guidance of Archaeological Survey of India. The caves are under the maintenance of the Archaeological Survey of India after the reorganisation of states and the dominions of erstwhile Nizams merged into the state of Maharashtra.

A brief account on the architectural splendour and artistic expressions of various caves is given here for enabling one to understand the real character and importance of this wonderful place.

A tourist can plan the visit of these caves according to the time available and depending upon the interest in ancient art. If a visitor has at his disposal three to four hours, then the Cave nos. 10 (Visvakarma Cave), 16 (Kailasa), 21 (Ramesvara) and 32 & 34 (Jaina group of caves) should not be missed. Thus, by visiting these caves, one can have a glimpse of the representative art of Buddhism, Brahmanism and Jainism. If a visitor has an entire day at his disposal, the Cave nos. 2, 5, 10 & 12 of the Buddhist group; Cave nos. 14, 15, 16, 21 & 29 of the Brahmanical group and Caves 32 to 34 of the Jaina group should be visited.

The caves are excavated in the scarp of a large plateau, running in a north-south direction for nearly 2 km, the scarp being in the form of a semi-circle, the Buddhist group at the right arc on the south, while the Jaina group at the left arc on the north and the Brahmanical group at the centre.
Open from sunrise to sunset
Closed on Tuesday
Entrance Fee:
Citizens of India and visitors of SAARC (Bangladesh, Nepal, Bhutan, Sri Lanka, Pakistan, Maldives and Afghanistan) and BIMSTEC Countries (Bangladesh, Nepal, Bhutan, Sri Lanka, Thailand and Myanmar) - Rs. 10 per head.

Others: US $ 5 or Indian Rs. 250/- per head
(children up to 15 years free)


Friday, August 1, 2014

World Heritage Sites - Pattadakal

 Group of Monuments at Pattadakal (1987), Karnataka


Chalukyan rulers were not only empire builders, but great patrons of art whose encouragement prompted the artists and craftsmen to experiment and innovate in different architectural styles and giving it a new dimension. It is in their period that transition from rock-cut medium to structural temples took place.

Pattadakal located in Bijapur district of Karnataka was not only popular for Chalukyan architectural activities but also a holy place for royal coronation, 'Pattadakisuvolal'. Temples constructed here mark the blending of the Rekha, Nagara, Prasada and the Dravida Vimana styles of temple building.

The oldest temple at Pattadakal is Sangamesvara built by Vijayaditya Satyasraya (AD 697-733). The other notable temples at Pattadakal are the Kadasiddhesvara, Jambulingeswara both attributed to 7th century A.D. while Galaganatha temple was built a century later in the style of rekha nagara prasada. The Kasivisvesvara temple was the last to be built in early Chalukyan style. The Mallikarjuna temple was constructed by Rani Trilokyamahadevi to celebrate the victory over the Pallavas by Vikramaditya II. She is also credited to have built the Virupaksha temple influenced by the architecture of the Kailasanatha temple at Kanchipuram. The Virupaksha temple later served as a model for the Rashtrakuta ruler Krishna I (757 -783 A.D.) to carve out the great Kailasa at Ellora.

However, the last addition at Pattadakal was made during the reign of Rashtrakuta ruler Krishna II of the 9th century A.D. in form of a Jaina temple, locally famous as Jaina Narayana, with its two lower storeys functional.

The sculptural art of the early Chalukyas is characterised by grace and delicate details. The ceiling panels of the navagrahas, dikpalas, the dancing Nataraja, the wall niches containing Lingodbhava, Ardhanarisvara, Tripurari, Varahavishnu, Trivikrama bear ample testimony to the sculptor's skill as well as the cult worship in vogue. The narrative relief illustrating certain episodes from the Ramayana, Mahabharata, Bhagavata and Panchatantra fitted well with these grand religious edifices.

The Sangamesvara, Virupaksha and Mallikarjuna temples at Pattadakkal exhibit to a large degree the southerly elements in their vimanas, as crystallized in the contemporary Pallava temples.

The Sangamesvara, the earliest of the three, built by Chalukya Vijayaditya (697-733), is nearer the Pallava form in that it has no sukanasika, while the other two, which possess this, are the earliest of the Chalukyan type and its derivatives possessing this architectural member, as also does the Kailasa at Ellora. Both the Sangamesvara and the larger Virupaksha are similar to each other in being square on plan from the base to sikhara. The Virupaksha, built by the queen of Vikramaditya II (733-46), is the earliest dated temple with the sukanasika, being closely followed by the Mallikarjuna, built by another queen of the same king.

The main vimana of the Sangamesvara is of three storeys. The lowermost storey is surrounded by two walls, the inner and outer, the second storey being an upward projection of the inner wall, while the outer wall encloses the covered circumambulatory round the sanctum.
              
The Virupaksha is a large complex consisting of a tall vimana with axial mandapas and peripheral sub-shrines round the court, enclosed by a wall with gopura-entrances in front and behind, all designed and completed at one time. As such, this is the earliest extant temple-complex in the Chalukyan series. The massive gopuras are also the earliest. The compound-wall of the complex, following the plan of the group itself, has on its coping kuta and said-heads, suggestive of a derivation from the Shore-temple at Mahabalipuram-a device which gives the impression of a lower storey when viewed from a distance.

The Mallikarjuna, built immediately after and close to the Virupaksha, is a smaller temple with a four-storeyed vimana with a circular griva and sikhara. It has more or less a similar plan.



Open from sunrise to sunset

Entrance Fee:

Citizens of India and visitors of SAARC (Bangladesh, Nepal, Bhutan, Sri Lanka, Pakistan, Maldives and Afghanistan) and BIMSTEC Countries (Bangladesh, Nepal, Bhutan, Sri Lanka, Thailand and Myanmar) - Rs. 10 per head.

Others: US $ 5 or Indian Rs. 250/- per head


(children up to 15 years free

Thursday, July 31, 2014

Cow Tongues May Be Damaging the Past


It’s 4 a.m. in the Nicaraguan frontier town of El Ayote. The kitchen chimney smoke and exhaust fumes combine with the dangling lights to give the main street an eerie vibe. Rumbling buses packed to the roof start their journey southwest to cross the mountains that mark the Nicaraguan watershed. Archaeologist and National Geographic Society/Waitt grantee Alexander Geurds maneuvers his pick-up truck in the sticky heat, past the buses, and heads into the opposite direction towards the lush vegetation of the Caribbean lowlands.

After about an hour of bouncing up and down on the unpaved path, Geurds crosses the river and arrives at an extraordinary location. Days before, Geurds and his team had discovered a pre-Hispanic settlement marked by numerous ancient sculptures; most of them still close to where indigenous people had carefully placed them some 600 or even possibly even 1,000 years ago. No one knows for sure how long they have been here or who created these magnificent sculptures. They are meticulously carved with mysterious designs depicting humans and animals. Who or what might these statues represent? Gods? Ancestors? Local elites?


This area of Nicaragua, one of the least accessible areas in Central America, was previously assumed to be devoid of any form of pre-Hispanic settlements. Now Geurds is investigating whether this site leads to a pattern of long forgotten settlements. The place is in remarkably good shape, the sculptures peacefully lying in grassy fields, as if forgotten by time. Only some occasional curious cow licking seems to have potentially damaged the sculptures. There is no direct evidence of looting, and only slight damage due to heat and moisture.

However, this could change from one day to the other since professional looters, continuously active in the region, are never far away. For now, an attentive landowner is keeping them at bay.


Evidence shows that the statues, each weighing a few tons, were hauled from a rock quarry somewhere in the surrounding landscape. Where exactly? With villages no greater than a few dozen families, harvesting and transporting these stones must have been an all-inclusive village affair. Two rivers merge within a stone’s throw from the ancient statues. Could this have been a place of pilgrimage where people came in canoes from perhaps as far as the Caribbean coast to mutually celebrate important periods in the year? If only the eyes on the statues could tell Geurds what they have seen.

For Alexander Geurds the bouncy road into the lowlands does not stop at this monumental site, it still goes on, just a bit more narrow. Local inhabitants speak of more statues (and bigger snakes!) further east.

Wednesday, July 30, 2014

Groundwater Depletion in Colorado River Basin Poses Big Risk to Water Security



Let’s step back for a minute and consider the implications of the study released last week on the depletion of groundwater in the Colorado River Basin.

For anyone concerned about the future of the American West, the findings of this study – which was published online in the journal Geophysical Research Letters and conducted by a team of scientists from NASA, the University of California-Irvine, and the National Center for Atmospheric Research in Boulder, Colorado—can make the heart pound.

Let’s start with a little context above ground, before going below.

Lake Mead is the largest reservoir in the United States and the granddaddy of reservoirs on the Colorado River.  This giant man-made lake, formed by the construction of Hoover Dam in the 1930s, can hold nearly two years of the Colorado River’s historic flow.

Some 40 million people – including those in Las Vegas, Los Angeles, Phoenix, Tucson and San Diego — and 4 million acres of farmland rely on water from the Colorado River Basin, much of it stored in Lake Mead.

In 2000, Lake Mead was just about full.  Then a drought hit that has more or less continued to this day.   This has been the driest 14-year period in the Colorado Basin in the last 100 years. Demand for the Colorado River’s water by the seven US states and Mexico, which share the river, now exceeds the ten-year average supply.

As a result, the level of Lake Mead has steadily dropped.  At full capacity, the lake’s level is 1,221.4 feet above mean sea level.  Today its level is at 1,080.9 feet, the lowest it has been since 1937, just after the completion of Hoover Dam.

The now-famous white bathtub ring around Lake Mead’s perimeter tells this story.

Because the lake is shaped like a coffee filter –wider at the top and narrower at greater depths – a seemingly small decline in water level represents a disproportionately large drop in the volume of water it’s storing. Today, instead of holding two year’s worth of Colorado River water, the lake holds about 9 months worth.

Water managers and officials have known for at least four decades that when surface supplies became scarce in the basin, farms and cities would turn to groundwater to meet their water needs, especially during times of drought.

But with groundwater management left to the states, there has been no overarching assessment of what’s happening to water underground – nothing equivalent to Lake Mead’s bathtub ring to signal a problem for the basin as a whole.

Until now.


Thanks to a NASA satellite mission called the Gravity Recovery and Climate Experiment, or GRACE, which began in 2002, we are getting a look at changes in water storage both above and below ground in watersheds around the world.

Using twin satellites, the GRACE mission measures the mass of the earth over time and space.  Because changes in water storage result in changes in mass, GRACE provides fairly accurate estimates of water depletion over time.

When Stephanie Castle of the University of California-Irvine and her colleagues analyzed GRACE data for the whole Colorado River Basin over the period December 2004 – November 2013, what they found stunned them: the Colorado Basin had lost nearly 53 million acre-feet of water (65 billion cubic meters) – equivalent to two full Lake Meads.

Even more striking, 77 percent of that loss – some 41 million acre-feet – was water stored underground.  That’s enough to meet the home water use of the entire US population for eight years.

(An acre-foot is the volume of water that would cover an acre of land one foot deep. It equals 325,850 gallons, roughly the amount eight people in the U.S. would use at home in a year.)

“We don’t know exactly how much groundwater we have left, so we don’t know when we’re going to run out,” Castle said in a press release announcing the study.

“This is a lot of water to lose. We thought that the picture could be pretty bad, but this was shocking.”

Now, it’s common for farms and cities to pump more groundwater during droughts in order to make up the gap between supply and demand.  The assumption is, that during times of surplus, the groundwater basins will fill back up. 

But what if they don’t re-fill?

Some groundwater basins do not receive much recharge even in wet times. I wrote last week about how drought is leading farmers to pump more heavily from the Ogallala Aquifer beneath northwest Texas, a largely irreversible loss of groundwater.  Areas of similar “non-rechargeable” aquifers also exist in the Colorado River Basin.
In addition, virtually all the climate models indicate that the Southwest is in for hotter and drier times, meaning more losses to evaporation, less replenishment of aquifers, and higher water demand from farms and cities.

Jay Famiglietti, senior water scientist at the NASA Jet Propulsion Laboratory, Earth systems science professor at UC-Irvine, and a co-author of this study, pointed out in his post in Water Currents last week that during the severe drought of the past decade, Colorado Basin water demands have outpaced supplies by as much as 30 percent, with groundwater filling the gap.

By focusing only on the drop in Lake Mead and paying too-little attention to the drop in water levels underground, we have placed the West’s water security in serious jeopardy.

Imagine having a bank account for which  you don’t know (1) how much money is in the account, (2) how much gets withdrawn, or (3) how much will get deposited, or when.

Such a money-management circumstance would offer little hope of keeping a family fed, clothed and sheltered over the long term, much less of sending a child to college.

So, we have two choices: continue flying water-blind into the future and leave the consequences to the next generation, or get our heads out of the sand and take action to monitor, manage and balance our water books.

If we choose the second option, what’s needed is fairly clear.

First, conservation and efficiency improvements in homes, businesses and, especially, on farms – which account for some 80 percent of water consumed in the basin – remain the most cost-effective, environmentally sound ways of meeting our water demands.  While we’ve made some solid gains, we have a long way to go and many solutions yet to tap.

Second, we need to manage and regulate — yes, regulate — groundwater.  It’s a finite supply, and as long as there’s no limit on the number of straws in the cup and how much they can slurp, the water level will keep going down. Pumping limits would promote more efficient water use.

Third, we should stop letting antiquated water laws trump sound economics.  If farmers were readily able to sell or lease water to cities and conservationists, they would have incentive to invest in more efficient irrigation practices, switch to less thirsty crops, or fallow a portion of their fields so they could sell the conserved water to others.  A healthier water market could help cities meet long-term needs and even help rivers weather a drought.

This, in part, is the spirit behind the Colorado River System Conservation Program, which would pay for voluntary reductions in water use – whether by fallowing farm fields, installing more efficient irrigation systems, recycling industrial water, or other means – that benefit the basin as a whole.

Lastly, management of Colorado River Basin water is overseen by a long list of federal and state authorities.  While collaboration has improved greatly in recent years, it’s imperative to cooperate around groundwater monitoring and reporting in order to get a basin-wide view of what’s happening underground.

The findings of this study are a wake-up call, and it would be foolish beyond measure to push the snooze button.

[Disclaimer: The editors of Geophysical Research Letters asked me to serve as a reviewer of the Castle et al. manuscript, which I did.]

Sandra Postel is director of the Global Water Policy Project, Freshwater Fellow of the National Geographic Society, and author of several books and numerous articles on global water issues.  She is co-creator of Change the Course, the national freshwater conservation and restoration campaign being piloted in the Colorado River Basin.

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