Snell Creek

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Coordinates: 38°42′13″N122°24′41″W / 38.70361°N 122.41139°W / 38.70361; -122.41139 [1]

Geographic coordinate system Coordinate system

A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position; alternatively, a geographic position may be expressed in a combined three-dimensional Cartesian vector. A common choice of coordinates is latitude, longitude and elevation. To specify a location on a plane requires a map projection.

Contents

Snell Creek is a 2.1-mile-long (3.4 km) [2] watercourse in Napa County, California. [3] It is situated approximately five miles north of Aetna Springs and is a tributary of Butts Creek, which ultimately merges into Putah Creek. [4]

Napa County, California County in California, United States

Napa County is a county north of San Pablo Bay in the northern portion of the U.S. state of California. As of the 2010 census, the population was 136,484. The county seat is the City of Napa. Napa County was one of the original counties of California, created in 1850 at the time of statehood. Parts of the county's territory were given to Lake County in 1861.

Aetna Springs, California Unincorporated community in California, United States

Aetna Springs is an unincorporated community in Napa County, California, United States. It lies at an elevation of 771 feet. The ZIP Code is 94567. The community is inside area code 707.

Putah Creek river in the United States of America

Putah Creek is a major stream in Northern California, a tributary of the Yolo Bypass, and ultimately, the Sacramento River. The 85-mile-long (137 km) creek has its headwaters in the Mayacamas Mountains, a part of the Coast Range, and flows east through two dams. First, Monticello Dam forms Lake Berryessa, below which Putah Creek forms the border of Yolo and Solano Counties, and then flows to the Putah Diversion Dam and Lake Solano. After several drought years in the late 1980s, the majority of Putah Creek went dry, prompting a landmark lawsuit that resulted in the signing of the Putah Creek Accord in 2000. The Accord established releases from the dams to maintain stream flows in Putah Creek, with natural flow regimes which spike in winter/spring and ebb in summer/fall. The restoration of natural flow regimes has resulted in a doubling of riparian bird species and a return of spawning native steelhead trout and Chinook salmon, as well as protecting the livelihood of farmers on the lower watershed.

Plants

Snell Valley is noted for its biodiversity of flora, and within Snell Valley is the Missimer Wildflower Preserve. An example of wildflowers in the Snell Creek watershed is yellow mariposa lily, Calochortus luteus . [5]

Biodiversity Variety and variabiity of life forms

Biodiversity refers to the variety and variability of life on Earth. Biodiversity typically measures variation at the genetic, species, and ecosystem level. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity. Biodiversity is not distributed evenly on Earth, and is richest in the tropics. These tropical forest ecosystems cover less than 10 percent of earth's surface, and contain about 90 percent of the world's species. Marine biodiversity is usually highest along coasts in the Western Pacific, where sea surface temperature is highest, and in the mid-latitudinal band in all oceans. There are latitudinal gradients in species diversity. Biodiversity generally tends to cluster in hotspots, and has been increasing through time, but will be likely to slow in the future.

Flora inventory of plant species in a given region

Flora is the plant life occurring in a particular region or time, generally the naturally occurring or indigenous—native plant life. The corresponding term for animal life is fauna. Flora, fauna and other forms of life such as fungi are collectively referred to as biota. Sometimes bacteria and fungi are also referred to as flora, as in the terms gut flora or skin flora.

Line notes

  1. ↑ "Snell Creek". Geographic Names Information System . United States Geological Survey.
  2. ↑ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed March 10, 2011
  3. ↑ David L. Durham. 2001
  4. ↑ Putah Creek Watershed. sacriver.org, accessed April 6, 2018
  5. ↑ C. Michael Hogan. 2009

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References


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