Kashkari, speaking on KMJ 580 radio from the World Ag Expo in Tulare, called for greater investment in dams.
"We need to build more storage," the gubernatorial candidate said on "The Ray Appleton Show."
Tim Donnelly, the other main Republican bidding to unseat Brown, has also called for more dam construction, though neither candidate has offered specific plans.
Kashkari's interview came just hours after Brown visited the agricultural expo. The visit was heavily colored by the drought, with members of Congress skirmishing over California water legislation and President Barack Obama preparing to visit Fresno on Friday.
The Democratic governor has yet to state a position on an $11.1 billion water bond scheduled for the November ballot, and offered no indication Wednesday about next steps on the drought.
"You've got to have rain," he told reporters, according to a recording provided by Valley Public Radio. "Aside from the rain, you've got to use the water efficiently, you've got to have storage and we have to balance all the interests, because we have no other choice."
Brown said he is trying "to find the middle path that will get the most done that is feasible under the Constitution and under the politics we have."
"Look, if anybody can get it done, I can get it done," he said, "and I'm working night and day to achieve it."
PHOTO: Neel Kashkari speaks at an interview with The Associated Press in Sacramento on Dec. 4, 2013. AP Photo/ Rich Pedroncelli