Drought

What is Drought?

Drought is a deficiency of water associated with a lack of precipitation. "It is a condition of moisture deficit that is sufficient to have an adverse effect on vegetation, animals and man over a sizeable area" USGS – The Hydrology of Drought. When a normal amount of moisture is not available to satisfy an area's usual water consumption, drought occurs. It begins when soil moisture is so diminished that enough water to replace that lost by transpiration cannot be absorbed by vegetation roots.

In areas that depend on rainfall for their moisture, drought can be defined as a period of insufficient rainfall for normal plant growth. In areas where a large percentage of the surface water comes from melting snowpack, such as in Colorado where this is 80 percent, drought can be defined as: "A period of insufficient precipitation, snowpack and reservoir storage to provide adequate water to urban and rural areas". Colorado State University Extension and Colorado Climate Center.

Why Study Drought?

Drought can occur locally, regionally or statewide. Its occurrence can be slow and last for many years or it can be a short-lived event. In both cases, the impacts can be significant. The interplay between a natural event, demands for water supply and the economic and environmental impacts that can result leads to drought impacts on society. Colorado State University Extension.

If you feel that there are additional websites that are appropriate for this Drought page, please email the webmaster with the URL address.


FREQUENTLY ASKED QUESTIONS


MAPS


DROUGHT BY STATE

Click on any State in the map below, or on the drop down menu to link to websites pertaining to drought. If you feel that there are additional websites that are appropriate for any given state, please email the webmaster with the URL address.

A-C
D-G
H-K
L-M
N-O
P-T
U-W
US Map ALABAMA ALASKA ARIZONA ARKANSAS CALIFORNIA COLORADO CONNECTICUT DELAWARE FLORIDA GEORGIA HAWAII IDAHO ILLINOIS INDIANA IOWA KANSAS KENTUCKY LOUISIANA MAINE MARYLAND MASSACHUSETTS MICHIGAN MINNESOTA MISSIPPIPPI MISSOURI MONTANA NEBRASKA NEVADA NEW HAMPSHIRE NEW JERSEY NEW MEXICO NEW YORK NORTH CAROLINA NORTH DAKOTA OHIO OKLAHOMA OREGON PENNSYLVANIA RHODE ISLAND SOUTH CAROLINA SOUTH DAKOTA TENNESSEE TEXAS UTAH VERMONT VIRGINIA WASHINGTON WEST VIRGINIA WISCONSIN WYOMING

DROUGHT WEBSITES


RESOURCES


FACT SHEETS


PUBLICATIONS


NEWS


TOOLS


DROUGHT CONDITIONS

Click on any State in the map below to link to the interactive drought conditions map and data for the state.

US Map ALABAMA ALASKA ARIZONA ARKANSAS CALIFORNIA COLORADO CONNECTICUT DELAWARE FLORIDA GEORGIA HAWAII IDAHO ILLINOIS INDIANA IOWA KANSAS KENTUCKY LOUISIANA MAINE MARYLAND MASSACHUSETTS MICHIGAN MINNESOTA MISSIPPIPPI MISSOURI MONTANA NEBRASKA NEVADA NEW HAMPSHIRE NEW JERSEY NEW MEXICO NEW YORK NORTH CAROLINA NORTH DAKOTA OHIO OKLAHOMA OREGON PENNSYLVANIA RHODE ISLAND SOUTH CAROLINA SOUTH DAKOTA TENNESSEE TEXAS UTAH VERMONT VIRGINIA WASHINGTON WEST VIRGINIA WISCONSIN WYOMING

Agricultural Water Conservation Clearinghouse, Ag Water, Ag Water Economics , Biotechnology and GMO for drought , Brackish Water, Center Pivot, Conservation Tillage , Consumptive Use , Cool Season Crops , Crop Rotation , Crop Selection , Crop Water Use , Cropping Systems , Deficit Irrigation , Ditch Canal Lining , Drip and Micro Systems , Drought Tolerant Crops , Dryland cropping , Effluent Water , ET Measurement , Evapotranspiration , Flood irrigation , Furrow diking , Furrow irrigation , Interruptible supply agreements , Irrigation Management , Irrigation Systems , Leaching , LEPA , LESA , Level basins , Limited Irrigation , Low Pressure Pivot , LPIC , Field leveling , Lysimeter , Municipal , Ogallala Aquifer , Pest Management , Phreatophyte , Planting Scheme , Polyacrylamide (PAM) , Precision Water Application , Rotational Fallowing , Salinity Management , Short Season Crops , Soil Moisture Measurement , Source Water , Surge flow irrigation , Tail Water , Underground Irrigation Piping , Water Application Measurement , Water Banking , Water Conservation , Water Conveyance and Delivery , Water Law/Policy , Water Leasing , Water Modeling , Water Recovery/Reuse , Water Scheduling , Water Storage , Water Supply , Water Transfers , Water Use Efficiency

Enter word(s) in the Search text box or leave it blank to conduct a search

  • By default, the search engine tries to locate records which match as much as possible all of the words entered in your search query

Opt to sort your results by Publication Year, Subject Category or Document Type

Use the following boolean operators in your search: AND, OR, NOT, TO.
For Example:

  • AND - Narrow search and retrieve records containing all of the words it separates
  • OR - Broaden search and retrieve records containing any of the words it separates
  • NOT - Narrow search and retrieve records that do not contain the term following it
  • TO - Narrow search by specifying a range of dates. The first date goes in the first text box, and the second date goes in the second textbox

Decide which fields to search for your keywords. Leaving it at the default "Anywhere in Record" is the most recommended setting.

  • Narrow your search by limiting the records to be searched in one or more subject categories
  • Click once to select a Subject Category; click a second time to eliminate the selection
  • Most Subject Categories are defined more narrowly by phrases and words that are common agricultural practices and techniques. Click the [+] to view Subject Category definitions
  • Narrow your search by limiting the records to be searched in one or more document type(s)
  • Click once to select a Document Type; click a second time to eliminate the selection