Instruct: Given a question, retrieve relevant documents that can help answer the question.
Query: What river runs through the Rhone valley?
At Martigny, where it receives the waters of the Drance on its left bank, the Rhône makes a strong turn towards the north. Heading toward Lake Geneva, the valley narrows, a feature that has long given the Rhône valley strategic importance for the control of the Alpine passes. The Rhône then marks the boundary between the cantons of Valais (left bank) and Vaud (right bank), separating the Valais Chablais and Chablais Vaudois. It enters Lake Geneva near Le Bouveret.
The "river region" is characterized by fertile mountain valleys and includes the Yarlung Tsangpo River (the upper courses of the Brahmaputra) and its major tributary, the Nyang River, the Salween, the Yangtze, the Mekong, and the Yellow River. The Yarlung Tsangpo Canyon, formed by a horseshoe bend in the river where it flows around Namcha Barwa, is the deepest, and possibly longest canyon in the world. Among the mountains there are many narrow valleys. The valleys of Lhasa, Shigatse, Gyantse and the Brahmaputra are free from permafrost, covered with good soil and groves of trees, well irrigated, and richly cultivated.
The river region is characterised by fertile mountain valleys and includes the Yarlung Tsangpo River (the upper courses of the Brahmaputra) and its major tributary, the Nyang River, the Salween, the Yangtze, the Mekong, and the Yellow River. The Yarlung Tsangpo Canyon, formed by a horseshoe bend in the river where it flows around Namcha Barwa, is the deepest, and possibly longest canyon in the world. Among the mountains there are many narrow valleys. The valleys of Lhasa, Xigazê, Gyantse and the Brahmaputra are free from permafrost, covered with good soil and groves of trees, well irrigated, and richly cultivated.
Mainz (; ; , ) is the capital and largest city of Rhineland-Palatinate, Germany. The city is located on the Rhine river at its confluence with the Main river, opposite Wiesbaden on the border with Hesse. Mainz is an independent city with a population of 206,628 (2015) and forms part of the Frankfurt Rhine-Main Metropolitan Region.
The Rhineland is historically a heavily industrial and population-dense area which includes the states of North Rhine-Westphalia, Rhineland Palatinate, and Saarland. This region is rich in iron and coal deposits and supports one of Europe's largest coal industries. In the past, sulfuric acid emissions from Rhineland coal plants contributed to acid rain, damaging forests in other regions like Hesse, Thuringia, and Saxony.
Below the confluence of the Little Naches and Bumping rivers, the Naches River flows southeast through Nile Valley, where it collects Nile Creek and Rattlesnake Creek. Then the river enters Naches Valley, where it collects its largest tributary, the Tieton River. Naches Valley is home to the towns of Naches and Tieton. The valley is filled with orchards, mainly growing apples. Irrigation water arrives via canals tapping both the Tieton and Naches rivers.
The river runs behind Lodge Park, a National Trust property, and through Larkethill Wood, where it flows under another lane, before passing Kilkenny Farm.
The Leach valley shows as a substantial dip in the B4425 Cirencester-Burford road. The river has an embankment at the bottom of the valley, but has not increased in size. Through all this section the river is often nearly invisible under summer vegetation. It then passes Swyre Farm with another road crossing, then Dean Farm, before reaching a very picturesque winding valley, crossed by the Westwell-Hatherop road. This section is notably a bourn in an unremarkable depression, which normally runs in the winter, but often disappears in the summer. (In recent dry winters - writing at summer 2007 - this section remained dry. Even more unusually, as of July 2007, it was running which has not happened during the summer for many years. The bourn section had been running continuously for long enough to have taken on the appearance of a river, with a scoured bed and water plants.)
The modern-day Champagne-Ardenne, bordering Belgium in northeast France, covers four departments: Aube, Ardennes, Haute-Marne, and Marne. This region saw much fighting in World War I (1914–1918) and many battles, of which arguably the most important were the First Battle of the Marne and the Second Battle of the Marne. The First Battle of the Marne, also known as the "Miracle of the Marne", was fought between 5 and 12 September 1914. The battle effectively ended the month-long German offensive that had opened the war and the counterattack of six French field armies and the British Expeditionary Force (BEF) along the Marne River forced the German Imperial Army to abandon its push on Paris and retreat northeast to the Aisne river, setting the stage for four years of trench warfare on the Western Front
In 1946, the Rhineland was divided into the newly founded states of Hesse, North Rhine-Westphalia, and Rhineland-Palatinate. North Rhine-Westphalia is one of the prime German industrial areas, containing significant mineral deposits, (coal, lead, lignite, magnesium, oil, and uranium) and water transport. In Rhineland-Palatinate agriculture is more important, including the vineyards in the Ahr, Mittelrhein, and Mosel regions.
The Odon is a river in the Calvados department, in Normandy, northwestern France. It is 47 km long and is a left tributary of the Orne. The river passes through Jurques, Aunay-sur-Odon, Baron-sur-Odon, Bretteville-sur-Odon, Épinay-sur-Odon, Grainville-sur-Odon, Parfouru-sur-Odon, Tournay-sur-Odon and Tourville-sur-Odon. It flows into the Orne in Caen.
Rhineland is located within the physiographic region known as the Texas Rolling Plains approximately south of the Brazos River at the intersection of farm-to-market roads 267 and 2534 in southeastern Knox County. It is situated to the southeast of the county seat of Benjamin, north of Munday and north of Abilene.
The Arun River enters from Tibet at an elevation of about 3,500 meters (11,500 feet) and flows south across the district, forming one of the world's deepest valleys relative to 8,481 meter Makalu to the west and 8,586 meter Kangchenjunga to the east.
Rhineland-Palatinate is located in western Germany covering an area of and a population of 4.05 million inhabitants, the seventh-most populous German state. Mainz is the state capital and largest city, while other major cities include Ludwigshafen am Rhein, Koblenz, Trier, Kaiserslautern, and Worms. Rhineland-Palatinate is surrounded by the states of North Rhine-Westphalia, Saarland, Baden-Württemberg, and Hesse. It also borders three foreign countries: France, Luxembourg and Belgium.
After Mainz and Ludwigshafen am Rhein, it is the third-largest city in Rhineland-Palatinate, with a population of around 112,000 (2015). Koblenz lies in the Rhineland.
Rhineland-Palatinate shares international borders with France (Grand Est), Luxembourg (Clervaux, Diekirch, Echternach, Grevenmacher, Remich, and Vianden), and Belgium (Wallonia). Within Germany it neighbours Baden-Württemberg, Hesse, Northrhine-Westphalia, and the Saarland. It is the ninth largest state by area. Rhineland-Palatinate is part of the SaarLorLux euregion.
The Danube was once a long-standing frontier of the Roman Empire, and today flows through 10 countries, more than any other river in the world. Originating in Germany, the Danube flows southeast for , passing through or bordering Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova and Ukraine before draining into the Black Sea. Its drainage basin extends into nine more countries. The Danube river basin is home to fish species such as pike, zander, huchen, Wels catfish, burbot and tench. It is also home to a large diversity of carp and sturgeon, as well as salmon and trout. A few species of euryhaline fish, such as European seabass, mullet, and eel, inhabit the Danube delta and the lower portion of the river.
The American River (Río de los Americanos during the period before 1847 ruled by Mexico) is a 120-mile-long river in California that runs from the Sierra Nevada mountain range to its confluence with the Sacramento River in the Sacramento Valley. Via the Sacramento River, it is part of the San Francisco Bay watershed. This river is fed by the melting snowpack of the Sierra Nevada and its many headwaters and tributaries, including the North Fork American River, the Middle Fork American River, and the South Fork American River.
The Main is navigable for shipping from its mouth at the Rhine close to Mainz for to Bamberg. Since 1992, the Main has been connected to the Danube via the Rhine-Main-Danube Canal and the highly regulated Altmühl river. The Main has been canalized with 34 large locks () to allow CEMT class V vessels () to navigate the total length of the river. The 16 locks in the adjacent Rhine-Main-Danube Canal and the Danube itself are of the same dimensions.
The Transylvanian Plateau, high, is drained by the Mureș, Someș, Criș, and Olt rivers, as well as other tributaries of the Danube. This core of historical Transylvania roughly corresponds with nine counties of modern Romania. The plateau is almost entirely surrounded by the Eastern, Southern and Romanian Western branches of the Carpathian Mountains. The area includes the Transylvanian Plain. Other areas to the west and north are widely considered part of Transylvania. In common reference, the Western border of Transylvania has come to be identified with the present Romanian-Hungarian border, settled in the 1920 Treaty of Trianon, though geographically the two are not identical.
Classified as an international waterway, it originates in the town of Donaueschingen, in the Black Forest of Germany, at the confluence of the rivers Brigach and Breg. The Danube then flows southeast for about , passing through four capital cities (Vienna, Bratislava, Budapest and Belgrade) before emptying into the Black Sea via the Danube Delta in Romania and Ukraine.
There are 1,716 kilometers of navigable inland waterways (1,043 km of navigable rivers and 673 km of navigable canals), which are almost all located in northern third of the country. The most important inland waterway is the Danube (part of Pan-European Corridor VII). Other navigable rivers include Sava, Tisza, Begej and Timiş River, all of which connect Serbia with Northern and Western Europe through the Rhine–Main–Danube Canal and North Sea route, to Eastern Europe via the Tisza, Begej and Danube Black Sea routes, and to Southern Europe via the Sava river. The largest river port is Novi Sad (1.18 million tons of cargo tonnage in 2016), while other river ports include Belgrade, Smederevo, Pančevo, Prahovo, Apatin, Bačka Palanka (all on Danube), Šabac (on Sava), and Senta (on Tisza).
The Gier rises at La Jasserie on the Perdrix mountain at about in the Pilat massif.
The "Saut du Gier" waterfall near the head of the river is in the Pilat Regional Natural Park.
The river runs for before joining the Rhone at Givors.
The Gier receives the Janon from its left at Saint-Chamond. 
The Janon from Terrenoire (now part of Saint-Étienne) to Saint-Chamond, and then the Gier from Saint-Chamond to Givors, create a valley in the coal basin between the Pilat massif to the south and the Riverie chain of the Monts du Lyonnais to the north.
The Gier rises at La Jasserie on the Perdrix mountain at about .
The river runs along the north side of the massif for before joining the Rhone at Givors.
The Gier receives the Janon from its left at Saint-Chamond. 
The Janon from Terrenoire (now part of Saint-Étienne) to Saint-Chamond and then the Gier from Saint-Chamond to Givors create a valley in the coal basin that runs between the Pilat massif and the Riverie chain of the Monts du Lyonnais.
The Rhone river runs south along the eastern border of the commune and Le Verdet stream flows from the north to the south of the commune into the Rhone.
To connect these towns and to allow the easy movement of Roman armies between Italy and Spain or up the Rhone Valley, Roman engineers constructed a series of new roads, solidly built and regularly maintained. The oldest was the Via Domitia, built in 118 BC, which went all the way from the Col de Montgenèvre, the easiest crossing point of the Alps, through Sisteron, Apt and Cavaillon to Tarascon on the Rhone River, and then along the coast to Narbonne and to Spain. The Via Aurelia ran from Italy to the Rhone Valley, passing through Cimiez, Fréjus, and Aix. The Via Agrippa ran up the Rhone Valley from Arles to Lyon, through Avignon, Orange, and Valence. It was completely rebuilt six times during the high Roman Empire.