First you can't blow a hole since most peaks are held by India Nepal Butan. You have to enter these territory to blow a hole. Majority of the water in yellow river and Yangzte comes from Indian ocean moisture. over Himalaya. this moisture is very weak over our side of Himalaya. a little cloud seeding and it will shed all moisture in india and Nepal.
East Asian wind and Westerlies cause rainfall but they don't feed your Qinghai-Glaciers Tibet Glaciers.
Monsoon winds blow away from China and toward Africa during the winter. In summer, they move across the Indian Ocean and toward China. Approximately 70 percent of the annual rainfall in the Tian Shan Mountains falls as a result of the monsoons. In addition to the summer monsoon, the southwest monsoon, which primarily affects India, also affects the climate of China as far north as the Xinjiang province.
The monsoons affect more than China's annual rainfall. As they approach China from India, they must cross the Tibetan Plateau and Himalayan Mountains. When the warm,
moist air of the monsoons hits the cold temperature of the mountains, it falls as rain on the Tibetan Plateau. Although this rainfall does not land directly on China, it is responsible for the yearly rising of China's Yellow and Yangtze Rivers. These rivers feed the coastal plain and provide water for much of China's agriculture.
https://www.reference.com/science/monsoons-affect-china-s-climate-a771e86b812cf48e
It moist air from Indian ocean that gives 45% of water in Yellow and Yangtze rives lol
If we stop this moisture over our Himalaya well within our border. you 45% water supply will be affected lol
Look at the maps again most of the snow capped mountains are inside Indian Nepal and butan border. You have to cross international border to blow a hole.
Even moisture winds over HinduKush and Pamirs flows over India, Which can be easily precipitated over the mountains in our Himachal pradesh using cloud seeding.