As a result, the runoff in future for Luanhe River Basin and Sanggan River Basin is 74 mm and 71 mm, respectively, which is approximately a quarter of mean annual runoff (284 mm) of the whole country.

• 未来滦河流域年径流深减少 2 7mm ；流量减少 14 .；72× 10 8m3；桑干河流域径流深增加 2 6mm；流量增加 12