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Tag: civil engineering (Page 3 of 4)

An Ode to Concrete

“This is Bombay, my friend, Bombay. Here the buildings are made of cement, and people’s hearts are made of stone.”

-The Beggar, Shree 420 (1955)

David Edgerton explains in his book The Shock of the Old that concrete, asbestos-cement, and corrugated metal are examples of creole technologies—technologies that originated in one place but took on new uses and meanings elsewhere. These materials in their modern forms were western inventions, but they have been particularly significant in the development of the poor world.1

It would be difficult, or perhaps impossible, to imagine modern India without concrete. The material can be produced cheaply and worked easily by either labor-intensive or capital-intensive methods. As such, it is the foundation—both literally as well as metaphorically—for much of India’s infrastructure.

The following gallery illustrates the complex and varied uses of concrete in contemporary India.

  1. David Edgerton, The Shock of the Old: Technology and Global History since 1900 (Oxford: Oxford University Press, 2007), 42-3. []
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Goodly Lakes

“Indeed, these Indian Lakes are goodly things, and may be reckon’d amongst the most remarkable structures in the world.” – Pietro della Valle (seventeenth-century Italian traveler to India)

Early-modern European travelers to India were unanimously impressed by the civil engineering works that they saw there, particularly artificial lakes and irrigation systems. I am impressed by these works as well. In the current post, I will explain the historical background of some of the artificial lakes and tanks that I have come across in my explorations of western India.

Jal Mahal Sagar is a roughly circular lake just north of the city of Jaipur. The lake takes its name from Jal Mahal (“Water Palace”), a picturesque structure that rises out of the lake near the southwestern shore. Even the dam that impounds the lake is picturesque; it is crenelated like the wall of a Rajput fortress. (See “Batman Goes to India” for a description of Rajput architecture.) The lake had a practical purpose beyond providing a location for the water palace: storing water in order to sure that the city of Jaipur received a reliable supply. Jal Mahal Sagar was an integral part of the original plan of Jaipur when the city was constructed in the 1720s.1

Hilltop view of Jal Mahal Sagar.

Hilltop view of Jal Mahal Sagar.

Jal Mahal, just outside of Jaipur.

Jal Mahal, just outside of Jaipur.

View of the fortresslike dam of Jal Mahal Sagar.

View of the fortresslike dam of Jal Mahal Sagar.

Some artificial lakes have since found uses that their builders did not intend. Take for example the Padam Talao, which now falls within the protected area of Ranthambhore National Park, a tiger reserve in eastern Rajasthan. The park’s crocodiles and deer drink from and wallow in the lake. Humans are not allowed in the water.

Padam Talao, in Ranthambhore National Park.

Padam Talao, in Ranthambhore National Park.

Smaller than artificial lakes are tanks. Whereas lakes fill a pre-existing valley behind a dam, tanks are intentionally dug into the ground. Since they do not have to follow the local topography, tanks can be made in whatever shape the builder pleases. Many of them are built with rectangular plans, which I think reflects the Hindu conception of an ordered world and cosmos (as also reflected by the rectangular street plan of Jaipur). It is not the result of European influence.

An exemplary tank is the Sagar, located behind the city palace in Alwar. According to the descriptive plaque at the site, the tank was originally dug in the eighth or ninth century, then rebuilt in its present form in 1813 by Maharaja Bakhtawar Singh Ji. The tank is a perfect rectangle, surrounded by steps descending to the water on all sides. Twelve domed pavilions rise from the edge of the water. Today, the water is overgrown with algae, but people still come to the tank to feed the fish that manage to live in the water.

View of Alwar Sagar.

View of Alwar Sagar.

Hilltop view of Alwar Sagar.

Hilltop view of Alwar Sagar.

  1. Giles Tillotson, Jaipur Nama: Tales from the Pink City (New Delhi: Penguin Books, 2006), 20. []
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The Technological Tourist Goes to Mexico

A VW drives down Calle Primera in Ensenada.

A VW drives down Calle Primera in Ensenada.

Studying history of technology for the past three years has gradually but inexorably changed the way I perceive the world around me. I now think about my surroundings technologically, especially when I visit a new place. I focus on the technology I see in the place, rather than its aesthetics—as any visitor could rightly be expected to do. Because of this, I take some rather unusual vacation snaps, focusing on such mundane technological subjects as bridges, factories, transmission lines, bicycles, and manhole covers.

A recent excursion to Ensenada, in the Mexican state of Baja California, illustrates this phenomenon well. During this trip, I was particularly impressed not by the differences between Mexico and the USA, but by the similarities. Looking at the built environment, I saw that in northern Baja, Mexicans had chosen similar solutions to problems as Americans had north of the border. Contrary to Anglo-American stereotypes that Mexicans are impoverished and rural, I saw that many of the people in Baja drove SUVs on well-made roads and frequented chain convenience stores (particularly the ubiquitous Oxxo).

The SUVS, roads, and convenience stores point to a high level of economic and technological development, much higher than in other parts of the world. On average, though, Mexicans are much less economically prosperous than their neighbors to the north. In some cases, then, they have had to seek solutions that are not capital-intensive. A few things I saw in Mexico reminded me of India; in both countries, restricted resources have forced people to adopt similar solutions to similar problems—even though these people live on opposite sides of the world from each other. Here are some examples:

Hand-lettered signs

In the USA, hiring a painter to produce a simple sign would be more expensive than having one made in a factory. In both Mexico and India, the reverse is often the case.

Hand-lettered signs on the Ensenada beach (left), and in the Indian Air Force Museum in New Delhi (right).

Hand-lettered signs on the Ensenada beach (left), and in the Indian Air Force Museum in New Delhi (right).

Roadside eateries

In India, dhabas are simple roofed structures with few or no walls, where food is prepared and sold on the cheap. I do not know if there is a similarly concise name for the structures in Mexican Spanish. These roadside eateries in both countries save on construction and energy costs; they are a less capital-intensive approach to fast food than the American approach of fully climate-controlled buildings.

Old cars, like new

Mexico’s equivalent to the long-lived Hindustan Ambassador is the Volkswagen Beetle, which was produced in Mexico until 2003, long after the original lines in Germany had closed. Mexican Beetles, some with aftermarket modifications, are a common sight in Ensenada.

One of many Mexican VWs that I saw and photographed.

One of many Mexican VWs that I saw and photographed.

Concrete

Mexicans and Indians don’t just use concrete to make roads and buildings; they use it for everything they want to make, ranging from monuments to trash cans.

Concrete heroes: the Indian (non-nonviolent) freedom fighter Bhagat Singh (left), and the Father of Mexico, Miguel Hidalgo (right).

Concrete heroes: the Indian (non-nonviolent) freedom fighter Bhagat Singh (left), and the Father of Mexico, Miguel Hidalgo (right).

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