If it rains in Goodland, Kansas... much of that water travels down the Kansas River right through the Capital City.
The Kansas River basin is huge, draining water from half of Kansas as well as parts of Nebraska and Colorado. The Kansas River flows into the Missouri River near Kansas City.
Flooding the Kansas River in Topeka takes a massive amount of water. Check out the top 5 water levels in history.
(1) 47.20 ft on 06/01/1844
(2) 40.80 ft on 07/13/1951
(3) 34.97 ft on 07/24/1993
(4) 33.90 ft on 06/30/1951
(5) 33.00 ft on 06/09/1908
Of those record crests in Topeka, only one is after the historic Great Flood of 1951. Since that event, Milford, Tuttle, Perry and Clinton Reservoirs were all built to control the water level and avoid such a catastrophe.
2019 has the potential to chase 1993 status. Note that the 3rd highest level on the Kansas River in Topeka was on July 24, 1993. That was 1 day after the emergency spillway gates at Tuttle Creek Lake were opened wide when the lake hit it's record of almost 1,138 Feet(above sea level). If and when water is released upstream, it has an effect downstream.