Yes, wadis, also known as gullies, arroyos or washes, are formed by infrequent, but heavy, rainfall in deserts.
Flash floods - a big killer of humans in desert regions.
runoffs are important to nature because runoffs move water to reach for animals needs and are vertify to be helpful to humans
After rainfall or snowmelt.
runoffs
rainstorms
It means not frequently. Infrequent things happen rarely or hardly ever. A lunar eclipse is an infrequent event.
The prefix of "frequent" is "frequen-."
agriculutural runoffs
Rainstorms are a major cause of flooding due to the rapid accumulation of water that can overwhelm drainage systems and cause rivers to overflow their banks. Snowmelt can also contribute to flooding, particularly when combined with heavy rainfall, but rainstorms are typically the more immediate and significant factor.
Constipation means infrequent defecation.
His letters became infrequent, then stopped completely