Defining Droughts

There are weekly updates from Drought Monitor from the University of Nebraska in Lincoln and I will be commenting on this topic regularly; I thought would be good idea to summarize in short on what a drought can be.

Droughts are natural and erratically occurring events that can happen anywhere around the world. It happens when there is a large-scale disruption with the global circulation of the atmosphere. Droughts are from the result of a shortage of precipitation over variable time periods and areal extents. The effects from lack of rainfall on the day-to-day use for needs of human and nature can create a natural disaster or hazard. Therefore, many disciples examine the causes and effects from droughts, like: geography, environmental science and studies, ecology, hydrology, meteorology, climatology, dendroclimatology, pedology, geology, and agriculture or horticulture.

Droughts can be classified into four types:

1)      Meteorological—it is the variable time periods and areal extents where there is a shortage of precipitation

2)      Agricultural—it is related to having soil moisture deficits and other parameters that negatively impacting the well-being of the vegetation  and it is characteristically associated from the effects from a meteorological drought

3)      Hydrological—it is the quicker reduction surface or subsurface water supplies and it is associated with a meteorological drought and additionally it can be intensified by a greater withdrawal from wells, rivers and lakes for human-use.

4)      Socioeconomic—it is impacts on societal needs from the shortage of usable water for day-to-day activities for food, health and business needs and it happens from the convergence of the other three droughts.

There are three parameters that gauge a drought: intensity, duration, and area. Intensity is the degree from the deficit of precipitation. Duration is the length of time that it occurs. The area is the specified region that has been affected.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s