अपवाह द्रोणी / जलनिकासी घाटी (Drainage basin in Hindi) / जलनिकासी घाटी
जिस क्षेत्र तक नदी का पानी रहता है उस क्षेत्र को Watershed /Drainage basin कहते हैं। इसमें नदी के पानी के साथ-साथ बारिश या बर्फ पिघलने के कारण पानी जिस जमीन पर आकर जमा होता है, भी शामिल रहता है। इस पूरे क्षेत्र को आवाह क्षेत्र/ अपवाह क्षेत्र Watershed /Drainage basin कहते हैं।
विकीपीडिया -
A drainage basin is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water. The drainage basin includes all the surface water from rain runoff, snowmelt, hail, sleet and nearby streams that run downslope towards the shared outlet, as well as the groundwater underneath the earth's surface.[1] Drainage basins connect into other drainage basins at lower elevations in a hierarchical pattern, with smaller sub-drainage basins, which in turn drain into another common outlet.[2]
Word Explanation
The area of land from which water drains into a river, for example, the Santa Ana River Basin, in which all land area drains into the Santa Ana River. Also called catchment area, watershed, or river basin.
