Physical geography

Sabinas Hidalgo is on two watersheds of the Rio Grande Hydrologic Region, the basin of the Falcon Dam-Rio Salado, north, and Sosa Rio Grande basin in the south.

Falcon Dam-Salado River

Falcon Dam is located 136 km downstream of Nuevo Laredo, Tamps., and 441 km upstream from the river mouth of the Rio Grande in the Gulf of Mexico. On the Mexican side, curtain and the vase are within the town of Mier, Tamps., and the U.S. within the Zapata and Starr counties, Texas.

The Salado River originates in the state of Coahuila, on to the confluence of the Sabinas and Nadadores. It crosses the state of Nuevo León going southeast, and during its course receives the waters of several streams, until it reaches the Falcon dam. Its intermediate sub: Rio Salado-Las Tortillas, Rio Salado-Anahuac, Zapote, Huizache and Zacatecas streams and Sabinas river.

Rio Bravo Sosa

The Sosa river, right confluent of the Alamo, is the first Mexican interest tributary that enters the right bank of the Rio Grande. Its intermediate sub: Saladito stream, Alamo River and Sosa river.

Sabinas River

Sabinas Hidalgo is crossed from west to east by the river of the same name, the river source is in the town of Mina with the name of Huzache Creek, runs trough Bustamante, Villaldama and Sabinas Hidalgo being a tributary of the Salado River, joins him at a place called San Martin de las Juntas. The river flow is intermittent and only when it rains intensely brings water sometimes causing considerable damage flood water as large as that of August 30, 1909 and September 6, 1933. This river has been called Sabinas because 4 kilometers from the municipal seat there is a spring and causes the river to traverse the people always bring water.

The river's waters are used by industries and agriculture. The river has not tributaries only increase the water in the rainy season along the left banks of the Morita stream and right of the Blanco Creek which participates in the formation of the  Anacua corner in the Sierra de Santa Clara. It is noteworthy that Ojo de Agua from Acequia del Agua (irrigation ditch) that comes from one corner of the Sierra Santa Clara for being this constant water to irrigate exploiting these rights Hacienda de la Mariscala.

The Sabinas River is the largest stream of this region. It crosses the town from east to west and is part of the slope of the Gulf of Mexico, Rio Grande hydrologic region (24), Falcon Basin - Rio Salado (24 D), sub Rio Sabinas Hidalgo (24 AD). Within the municipality is the dam "Mariano Escobedo" in Sombreretillo with 19 million cubic meters capacity and Ojo de Agua de Sabinas, an ever-flowing wellspring from which rises to the surface of the Sabinas River into town.