Comments by "Peter Lund" (@peterfireflylund) on "China Observer" channel.

  1. 69
  2. 11
  3. 7
  4. 6
  5. 6
  6. They have a good excuse for the yellow river. It is yellow because of very, very fine grains of stone suspended in the water (called “loess”). They get blown into the river by the wind while the river is flowing on a high plain at the beginning of its course. Then it flows fast downhill for quite a while. The speed and the turbulence whisks the water so the loess stays suspended in the water. Then the river comes to a long stretch that is almost flat. The river flows slowly, it becomes wide, and the loess slowly falls out of suspension and gets deposited at the bottom. And that means there are many places along the river where the riverbed becomes lower and lower (and wider and wider) until suddenly the river decides to change course. There is not a lot that can be done about it. The rest of the floods are due to human folly, just like everywhere else, plus a few places where the river is bordered by steep mountain sides (also typical for flood-prone rivers elsewhere). Rainwater flows down the mountain sides, there is nowhere for the river to go except “up” and “fast”, ... By human folly, I mean: building villages and cities right next to the river, often with a mountain side behind the city... or hemming the river in with walls along its course so it can’t overflow to meadows/fields... or straightening the river out so it flows quicker.... or building dams to take up the rainwater but then not emptying them before the rain comes... Rivers need flood plains to overflow to so they don’t overflow cities/villages!
    5
  7. 5
  8. 4
  9. 3
  10. 2
  11. 2
  12. 2
  13. 2
  14. 2
  15. 2
  16. 2
  17. 2
  18. 2
  19. 1
  20. 1
  21. 1
  22. 1
  23. 1
  24. 1
  25. 1
  26. 1
  27. 1
  28. 1
  29. 1
  30. 1
  31. 1
  32. 1
  33. 1
  34. 1
  35. 1
  36. 1
  37. 1
  38. 1
  39. 1
  40. 1
  41. 1
  42. 1
  43. 1
  44. 1
  45. 1
  46. 1
  47. 1
  48. 1
  49. 1
  50. 1
  51. 1
  52. 1
  53. 1
  54. 1
  55. 1
  56. 1
  57. 1
  58. 1
  59. 1