Tag: Arabic

An irrigation ditch, specifically the gravity-fed earthen channels that distribute water from a river or spring to fields and gardens throughout the arid American Southwest. Acequias are not just infrastructure — they are community institutions, governed by elected mayordomos, maintained by shared labor, and central to the social life of the villages they serve. Some have been in continuous use for over 400 years.

Sun-dried brick made from a mixture of clay-rich soil, water, sand, and straw — one of the oldest building materials in the world. Also the name for the clay soil itself. Adobe construction is found wherever the climate is dry enough for the bricks to cure and the soil has the right proportion of clay: the American Southwest, northern Mexico, North Africa, the Middle East, and the Sahel. An adobe wall breathes with the day — absorbing heat in the morning, releasing it at night — and returns to the earth it came from when abandoned.

A recessed, arched opening in a cliff face, carved by water seeping through porous sandstone and undermining a harder caprock layer above. Alcoves in canyon country can be enormous — roofed chambers large enough to hold entire Ancestral Puebloan villages, as at Mesa Verde and Canyon de Chelly. The word applies to architecture too, but the geological version came first: the rock makes the room.

A barren, white-crusted expanse of soil in an arid basin where evaporation has concentrated salts — sodium carbonate, sodium sulfate, sodium chloride — at the surface, creating a sterile, often blinding-white crust. Nothing grows on a true alkali flat. The soil is poisoned by its own chemistry, the water table too saline for roots, the surface too caustic for germination. Alkali flats shimmer in heat, crack in geometric patterns, and represent one of the harshest conditions soil can reach.

The horizontal angle between true north and the direction of an object, measured clockwise. Due east is 090°, south is 180°, west is 270°. Azimuth is how the horizon is numbered — the compass rose translated into degrees.

A vast sea of wind-deposited sand dunes — the sand desert of popular imagination, though sand deserts actually account for only about 20 percent of the world's desert area. Ergs can cover hundreds of thousands of square miles, with individual dunes reaching heights of 500 feet or more. The Sahara contains several of the world's largest ergs, including the Grand Erg Oriental and the Grand Erg Occidental in Algeria. An erg is a landscape in continuous slow motion — the dunes migrate, merge, split, and reform under the wind's direction.

 A violent dust storm or sandstorm driven by strong winds, most commonly in the Sudan and the Sahel but also occurring in the American Southwest. A haboob can form a wall of dust thousands of feet high, advancing across the landscape like a living thing.

A barren, rocky desert plateau — a flat or gently undulating expanse of bare bedrock, swept clean of sand and soil by wind and runoff. Hamada is the most austere desert landscape: no dunes, no gravel, no vegetation, just stone and sky. The Hamada du Draa in the western Sahara is one of the largest.

An Arab navigation instrument: a small rectangular card held at arm's length on a knotted string, used to measure the altitude of the North Star above the horizon and thereby determine latitude. Each knot corresponds to a known port. The whole Indian Ocean, navigated with a piece of wood and a string.

A hot, dry, sand-bearing wind that blows across Egypt and the eastern Mediterranean, typically in spring. It can raise temperatures by 20 degrees Celsius in hours and fill the air with a fine, orange dust that infiltrates everything.

A seasonal reversal of prevailing winds, most dramatically in South and Southeast Asia, where the summer monsoon brings months of heavy rain from the Indian Ocean and the winter monsoon brings dry air from the continent. The word has come to mean the rains themselves, but it is properly a wind — a wind that changes its mind twice a year.

The point directly below you, opposite the zenith — through the earth and out the other side. In common use it means the lowest point of anything. The Arabic astronomers who named it were mapping the geometry of the sky, and the lowest point was the one you couldn't see.

A flat, stony desert surface — a plain of gravel and pebbles from which the finer sand and dust have been removed by wind, leaving behind a lag deposit of coarse material. Reg is the most common desert surface type worldwide, though it is less famous than the erg. It is the desert stripped to its bones — nothing soft, nothing loose, nothing growing. Walking on reg is walking on an infinite gravel parking lot.

A flat, salt-encrusted coastal or inland plain in an arid region, formed where a shallow water table lies close enough to the surface for groundwater to evaporate and deposit its dissolved minerals as a crust. Sabkhas are treacherous — the surface appears firm but may collapse into soft, saline mush beneath. Coastal sabkhas are common along the Persian Gulf and the Red Sea; inland sabkhas form in closed basins throughout the Sahara and the Arabian Peninsula.

Arabic: a walk or wander that leads to some kind of revelation or spiritual renovation. Not aimless — purposefully open. You go out walking and come back changed.

A long, narrow, sharp-crested sand dune aligned parallel to the prevailing wind direction — a sand ridge that can run unbroken for miles. Seif dunes form in areas of consistent wind direction with abundant sand, and they dominate the great ergs of the Sahara and the Arabian Peninsula. Seen from the air, a field of seif dunes looks like a plowed field at continental scale.

A flat, pebble-strewn desert plain in the Sahara — similar to reg but often with slightly larger stones and a harder, more wind-polished surface. Serir landscapes are monotonous and immense, stretching to the horizon without feature.

A strong, hot, dry wind that blows across the deserts of the Arabian Peninsula and North Africa, carrying sand and capable of raising air temperatures above 130°F. The word implies danger — exposure can be fatal.

A hot, dry, dust-laden wind that originates in the Sahara and blows northward across the Mediterranean into southern Europe. By the time it reaches Italy, Sicily, or the Balkans it may have picked up moisture from the sea, arriving as a humid, oppressive, sand-tinged gale. Different names follow it across the region — ghibli in Libya, khamsin in Egypt, leveche in Spain.

A valley or streambed in the desert that is dry except during rainy periods — the Arabic equivalent of the Spanish arroyo. Wadis are the drainage channels of arid landscapes across North Africa, the Arabian Peninsula, and the Middle East, carved by flash floods that may come only a few times a year or a few times a decade. Between floods, wadis serve as travel corridors, gathering places, and sites of settlement — the trees, the wells, and the shade are found in the wadi bed, where the last water sank into the sand.

The point in the sky directly above you. Your zenith is yours alone — no two people standing in different places share the same one. The opposite is nadir.