Wednesday, October 19, 2022

Nowhere-ing a Bridge

Most of the Amazon Basin is flat, very flat. How flat? Flat enough that the Rio Solimões and Rio Negro flow languidly beside each other for about 30 miles past their confluence, in the famous Wedding of the Waters near Manaus.

The slope of Amazonian rivers is remarkably flat even hundreds of miles upstream, closer to headwaters areas, as I was reminded when trying to understand this pair of photographs, which I noticed this morning on the Rondônia, Minha Querida Rondônia page on Facebook. 



Group administrator Dacosta Dacosta shared these, with the caption "Ponte EFMM de Mutum Paraná, em duas épocas" (Madeira-Mamoré Railroad bridge at Mutum Paranà, in two different periods).

My first instinct was to look for the bridge on Google maps, based on the place name he used. There is an interesting difference between the map version and the satellite version of the map right now; the map has not caught up with this inundation, even though it seems to be more or less permanent.


Both images, Google Maps as accessed October 19, 2022

The main indication that this is a permanent flood -- indeed, an anticipated flood -- is that a causeway and  bridge were built for the BR-364 highway, where nothing more than a culvert is present on the map version.

 I assumed that this related to hydroelectric projects that were completed about a decade ago -- none were present during my first three visits to the area, but I did see the Santo Antâo dam when I returned in 2019. My master's thesis involved finding dams of various sizes on aerial photographs and satellite images, so I assumed searching the area of the lake that now contains Rio Cutia would be simple. I looked over this area, to no avail:

Back I went to Google. This time I searched for the Mutum Paraná and the word "usina" for hydroelectric plant. I remember the word from visiting and researching Usina Samuel on the Rio Candeias years ago. This led to an article about Usina Hidrelétrica de Jirau, which fortunately includes geographic coordinates --  9°15′51.8″ S, 64°38′30.8″ O. Realizing that O is for Oeste, I searched for this lat/long, changing the last character to W, and found the Jirau hydroelectric. 

Usina Jirau, Google Maps accessed on
October 19, 2022

Zooming out, I could see that this is nowhere near the inundation that first got my attention. In fact, it is about 60 kilometers (35 miles) downstream -- with many miles in between where the Madeira (the Amazon's longest tributary) seems to be within its normal banks.

The engineers who built the dam, however, know exactly how flat this land is, and they used Geographic Information Systems to figure out where the floods would be and what steps they would need to take in order to protect the BR364 highway as it passes over what was previously a trivial tributary, many miles from their main project.

Lagniappe

During my first visit to Rondônia (Brazil's 26th state) in 1996, I saw the first internet server while it was still in a shipping box. For years after, my (now outdated) Rondônia Web page was the only online English-language resource about the place. Now it is a place full of very connected people of all ages, and this particular Facebook group has almost as many members as the entire state did in 1960. This page is similar to many groups pages I find in U.S. communities, brimming with nostalgia.



No comments:

Post a Comment

Thanks for your comment and your interest in my blog. I will approve your comment as soon as possible. I had to activate comment moderation because of commercial spam; I welcome debate of any ideas I present, but this will not be a platform for dubious commercial messages.

Blog Ideas

coffee (25) GEOG381 (24) GEOG388 (23) GEOG470 (18) climate change (17) GEOG130 (16) geography (16) GEOG332 (13) GEOG431 (12) musica (11) GEOG 381 (9) Mexico (9) Brazil (8) GEOG286 (8) Texas (8) education (8) migration (8) GEOG298 (7) borderlands (7) GEOG199 (6) GEOG331 (6) Massachusetts (6) US-Mexico (6) deBlij04 (6) immigration (6) GEOG 286 (5) GEOG 332 (5) GEOG287 (5) climate justice (5) cultural geography (5) fair trade (5) food (5) geographic education (5) nicaragua (5) water (5) Arizona (4) GEOG 130 (4) GEOG 171 (4) GEOG171 (4) GEOG295 (4) Safina (4) africa (4) deBlij05 (4) music (4) politics (4) Bolivia (3) Boston (3) COVID-19 (3) Detroit (3) Ethiopia (3) Managua (3) Obama (3) border (3) cartography (3) drought (3) land protection (3) libraries (3) pesticides (3) suburban sprawl (3) trade (3) unemployment (3) Alaska (2) Amazon (2) Bridgewater (2) Canada (2) Chiapas (2) China (2) Colonialism (2) EPA (2) EarthView (2) Economy (2) Environment (2) GEOG 199 (2) GEOG 287 (2) Google Maps (2) Government (2) Hawaii (2) India (2) Lexington (2) Maldives (2) Mozambique (2) NOLA (2) NPR (2) National Monuments (2) National Parks (2) New Orleans (2) Religion (2) Rio Grande (2) Taunton River Wild and Scenic (2) Tex-Mex (2) The View from Lazy Point (2) United States (2) Venezuela (2) anthropocene (2) cape verde (2) censorship (2) central america (2) chocolate (2) corn (2) deBlij07 (2) deforestation (2) demographic transition (2) demography (2) education reform (2) employment (2) environmental geography (2) film (2) forest fire (2) global warming (2) islands (2) librarians (2) maps (2) organic (2) peak oil (2) refugees (2) sense of place (2) soccer (2) sustainability (2) television (2) water rights (2) whales (2) #bbc (1) #nicaragua (1) #sosnicaragua (1) #sosnicaragua #nicaragua (1) 100 Years of Solitude (1) ACROSS Lexington (1) Accents (1) Adam at Home (1) Alice (1) Alt.Latina (1) American Hustle (1) April (1) Association of american Geographers (1) Audubon (1) Aunt Hatch's Lane (1) BSU (1) Baby Boomers (1) Banda Aceh (1) Bay Circuit Trial (1) Bechtel (1) Beleza Tropical (1) Belize (1) Beloit College (1) Ben Linder Cafe (1) Bet The Farm (1) Bhopal (1) Biafra (1) Bikeway (1) Bikini (1) Bill Gates (1) Bill Moyers (1) Boeing 777 (1) Brazilian (1) Brazilianization (1) Bridge (1) British Columbia (1) Brockton (1) Bus Fare (1) Bush (1) Cabo Verde (1) California (1) Cambridge (1) Cape Cod Bay (1) Carl Stafina (1) Catholic (1) Ceuta (1) Chalice (1) Chipko (1) Citgo (1) Climate risks (1) Cochabamba (1) Colombia (1) Common Core (1) Commuter (1) Computers (1) Cuba (1) Cups and Summits (1) Dallas (1) David Byrne (1) Deans Beans (1) Delaware Valley (1) Dunkin Donuts (1) Earth Day (1) Earth View (1) Easton (1) El Salvador (1) Elizabeth Warren (1) Ellicott City (1) Emilia Laime (1) English-only (1) Environmental History (1) Euphrates (1) European Union (1) Evo Morales (1) FIFA (1) FYS (1) Fades Out (1) Farms (1) First-Year Seminar (1) Food Trade (1) Frederick Kaufman (1) French press (1) Fresh Pond Mall (1) GEOG 388 (1) GEOG 431 (1) GEOG 441 (1) GEOG213 (1) GEOG490 (1) Gabriel García Márquez (1) Garden of Gethsemane (1) Gas wells (1) Gateway Cities (1) General Motors (1) Gini Coefficient (1) Girl in the Cafe (1) Google (1) Gordon Hempton (1) Gravina Island Bridge (1) Great Migration (1) Great Molasses Flood (1) Guy Lombardo (1) Haiti (1) Hawks (1) Heart (1) Higher Education (1) History (1) Holyhok Lewisville (1) Homogenous (1) Honors (1) How Food Stopped Being Food (1) Hugo Chavez (1) IMF (1) Iditarod (1) Imperial Valley (1) Income Inequality (1) Indonesia (1) Iraq (1) Irish (1) Japan (1) Junot Diaz (1) Kenya (1) Ketchikan (1) Key West (1) Kindergarden Students (1) King Corn (1) Kiribati (1) Latin America (1) Limbaugh (1) Literature (1) Living On Earth (1) Louisiana (1) Love Canal (1) Luddite (1) M*A*S*H (1) MCAS (1) MacArthur Genius (1) Maersk (1) Malawi (1) Malaysia (1) Malaysian Air Flight 370 (1) Mali (1) Manu Chao (1) Map (1) Marblehead (1) Mary Robinson Foundation (1) Maryland (1) Massachusetts Bay Colony (1) Math (1) Maxguide (1) May (1) Maya (1) Mayan (1) Mayan Gold (1) Mbala (1) McDonald's (1) Melilla (1) Mexicans (1) Michael Pollan (1) Michelle Obama (1) Micronesia (1) Military (1) Military Dictatorship (1) Minuteman Trail (1) Mongolia (1) Monsanto (1) Montana (1) Morocco (1) Mount Auburn Cemetery (1) Muslim (1) NPS (1) Nantucket (1) National Education Regime (1) Native American (1) Native Americans (1) New Bedford (1) New Hampshire (1) New York City (1) New York Times (1) Nigeria (1) No Child Left Behind Act (1) Norquist (1) North Africa (1) Nuts (1) Oakland (1) Oaxaca (1) Occupeligo (1) Occypy (1) Oklahoma (1) Oklahoma City (1) Oppression (1) PARCC (1) Pakistan (1) Pascal's Wager (1) Peanut (1) Pearson Regime (1) Philadelphia (1) Philippines (1) Pink Unicorns (1) Poland (1) Portuguese (1) Protest (1) Public Education (1) Puebla (1) Puritans (1) Quest University (1) Rachel Carson (1) Reading (1) Republican (1) Retro Report (1) Robert Reich (1) Rock Legend (1) Ronald Reagan (1) Rondonia (1) Rosa Parks (1) SEXCoffee (1) Safety (1) Samoza (1) Sandino (1) Sara Vowell (1) Save the Children (1) Scotch (1) Scotland (1) Seinfeld (1) Senegal (1) Sergio Mendes (1) Severin (1) Sharrod (1) Silent Spring (1) Sinatra (1) Slope (1) Smokey the Bear (1) Somalia (1) Sombra (1) Sonora (1) Sonoran desert (1) Sonoran hot dog (1) South America (1) Spain (1) Stairway to Heaven (1) Storm (1) Suare Inch of Silence (1) Sumatra (1) Swamp (1) Tacloban (1) Tanzania (1) The Amazon (1) The Amazon Trail (1) Tigris (1) Tucson (1) Tufts (1) U.S Federal Reserve (1) U.S Government (1) U.S. economy (1) USDA (1) USLE Formula (1) Uganda (1) Unfamiliar Fishes (1) Union Carbide (1) Vacation (1) Vexillology (1) Vietnam (1) ViralNova (1) WNYC Data News (1) Wall Street (1) Walsenburg (1) Walt Disney (1) Walt and El Grupo (1) Ward's Berry Farm (1) West (1) Whaling (1) Wilson (1) Winter Storm Saturn (1) Wisconsin (1) World Bank (1) Xingu (1) YouTube (1) Zombies (1) agriculture (1) antitrust (1) aspen (1) austerity (1) aviation (1) banned books (1) bark beetle (1) bean (1) bicycle (1) bicycling (1) bike sharing (1) binary (1) biodiversity (1) bioneers (1) books (1) boston globe (1) cacao (1) cafe (1) campaign (1) campus (1) cantonville (1) capitals (1) carbon dioxide (1) carbon offsets (1) carioca (1) cash (1) cashews (1) census (1) chemex (1) chemistry (1) chronology (1) churrasco (1) civil rights (1) coffee grounds (1) coffee hell (1) coffee prices (1) coffee quality (1) college (1) compost (1) computerized test (1) congress (1) conservation commission (1) corporations (1) countries (1) cubicle (1) dams (1) deBlij06 (1) deBlij08 (1) death (1) deficit (1) development (1) dictatorship (1) distracted learning (1) distraction (1) drug war (1) dtm (1) earth (1) economic diversification (1) economic geography (1) election (1) embargo (1) energy (1) enhanced greenhouse effect (1) environmentalist (1) ethnomusicology (1) exremism (1) failed states (1) farming (1) financial crisis (1) football (1) forestry (1) forro (1) fracking (1) free market (1) free trade (1) fuel economy (1) garden (1) genocide (1) geography education (1) geography games (1) geography of chocolate (1) geography of food (1) geologic time (1) geotechnology (1) gerrymandering (1) global pizza (1) globe (1) goodall (1) green chemistry (1) ground water (1) guacamole (1) guatemala (1) high-frutcose (1) home values (1) hospitality (1) hourglass (1) housing (1) illegal aliens (1) income (1) indigenous (1) interfaith (1) journalism (1) kitchen garden (1) labor (1) landscape ecology (1) language (1) libertarianism (1) library (1) linguistics (1) little rock (1) llorona; musica (1) macc (1) maccweb (1) magic realism (1) maple syrup (1) mapping (1) masa no mas (1) massland (1) medical (1) mental maps (1) mi nina (1) microlots (1) microstates (1) mining (1) mltc (1) monopoly (1) municipal government (1) nautical (1) neoclassical economics (1) new england (1) newseum (1) newspapers (1) noise pollution (1) pandas (1) petroleum (1) piracy (1) pirates (1) poison ivy (1) police (1) political geography (1) pollution (1) provincial government (1) proxy variables (1) public diplomacy (1) quesadilla (1) rabbi (1) racism (1) real food cafe (1) regulations (1) remittances (1) resilience (1) resistance (1) respect (1) rigoberta menchu (1) rios montt (1) romance (1) roya (1) runways (1) russia (1) satellites (1) science (1) sea level (1) selva negra (1) sertao (1) sertão (1) sex (1) sex and coffee (1) simple (1) sin (1) smokey (1) solar (1) solar roasting (1) south africa (1) sovereignty (1) species loss (1) sporcle (1) sports (1) state government (1) taxes (1) tea party (1) teaching (1) textile (1) texting (1) tortilla (1) training (1) transect; Mercator (1) travel (1) triple-deckers (1) tsunami (1) urban geography (1) utopia (1) vermont (1) vice (1) video (1) wall (1) water resources (1) water vapor (1) whiskey (1) whisky (1) widget (1) wifi (1) wild fire (1) wildfire (1) wildlife corridor (1) wto (1)