irrigation

Most — about 88 percent — of the total annual flow of water in the Lower Colorado River Basin originates upstream of Glen Canyon Dam (in northern Arizona) as a result of natural runoff from precipitation and melting snow in the mountains of Colorado, Wyoming, Utah and New Mexico.

Located in the southwestern United States and northwestern Mexico, the Colorado River is a 2,330-kilometer (1,450-mile) river with its headwaters in the Rocky Mountain National Park in north-central Colorado. The river is the primary source of water for a region that receives little annual rainfall.

Most of public-supply withdrawals occurred in the lower CRB, ranging from 87 to 91 percent of total public-supply withdrawals in the CRB over the 25 years.

Agricultural water use is falling, while the economic value of farm production is growing. The San Francisco Bay and South Coast regions account for most urban water use in California. Both rely heavily on water imported from other parts of the state. Total urban water use has been falling even as the population grows.

Mumbai’s

Bengaluru, Bhopal as well as Gujarat’s Dholavira and Madhya Pradesh’s Dhubela are among the cities and towns in India with some of the most interesting urban projects that manage, protect and conserve water supply.

Currently, many Indian states, including Andhra Pradesh, Chhattisgarh and Tamil Nadu, face water shortages, exacerbated by changing rainfall patterns, IndiaSpend reported on 6 June.

As per the Composite Water Management Index (CWMI) report released by the Niti Aayog, it was predicted that 21 Indian cities, including Delhi, Bengaluru, Chennai and Hyderabad, will face Day Zero situation by 2020. And not to be surprised, Chennai has become the first Indian city to have gone dry.

Delhi is one of 21 Indian cities that could run out of groundwater this summer, according to a 2018 government thinktank report. If and when this happens, it will be known as “day zero”. The water woes are a product of years of booming population growth, drought and mismanagement.

Venice has been known as “La Dominante”, “La Serenissima”, “Queen of the Adriatic”, “City of Water”, “City of Masks”, “City of Bridges”, “The Floating City”, and “City of Canals”….Venice.

Groundwater is being pumped faster than it can be naturally replenished. The Central Valley Aquifer in California underlies one of the nation’s most agriculturally productive regions, but it is in drastic decline and has lost about ten cubic miles of water in just four years.

The world’s changing climate has been linked to an increased incidence of droughts that can greatly diminish freshwater supplies in a region. The historic drought in California has depleted the Sacramento and San Joaquin river basins by an estimated 11 trillion gallons below normal seasonal levels.