Segura (Spanish and Valencian: [seˈɣuɾa] ⓘ; Latin: Thader; Arabic: شقورة, romanized: Shaqūrah, or وادي الأبيض Wādī l-Abyaḍ) is a medium-sized river in southeastern Spain.

The alluvial plain is called the Vega del Segura and is a very productive agricultural region growing a wide variety of fruit, vegetables, and flowers.

In addition, a wastewater reclamation levy was established to finance the operation, maintenance and monitoring of these systems, applying the principle "the polluter pays".

Since 2010, pollution has been unnoticeable, leading to the recovery of fauna and flora including increased otter population in parts of the river they had once abandoned.

[4] The Segura is usually in a state of semi-permanent drought, however, now and then, it does occasionally flood as the consequence of the torrential rains (cold drop), which typically take place once every 6–9 years approximately, always in Autumn and Spring.