கேள்வி: நீர்வழி அடிப்படையில் நாடுகளின் பட்டியல் பற்றி விளக்கவும்.
பதில்: இது ஒரு நீர்வழி அடிப்படையில் நாடுகளின் பட்டியல் ஆகும். இத்தரவின் பெரும்பகுதி த வேர்ல்டு ஃபக்ட்புக் மூலம் பெறப்பட்டது. {| class="sortable wikitable" |- bgcolor="#ececec" valign=top ! தரம்!! நாடு !! நீர்வழி (கிமீ) !! தகவல்பெறப்பட்டது |- | — || ''உலகம்'' || 671,886 || 2004 |- | 1 || || 110,000 || 2011 |- | 2 || || 102,000 || 2009 |- | — || || 52,332 || 2006 |- | 3 || || 50,000 || 2008 |- | 4 || || 41,009 || 2008 |- | 5 || || 21,579 || 2008 |- | 6 || || 18,000 || 2008 |- | 7 || || 17,702 || 2008 |- | 8 || || 15,000 || 2008 |- | 9 || || 14,500 || 2008 |- | 10 || || 12,800 || 2008 |- | 11 || || 11,000 || 2007 |- | 12 || || 11,000 || 2006 |- | 13 || || 10,000 || 2007 |- | 14 || || 8,808 || 2008 |- | 15 || || 8,600 || 2008 |- | 16 || || 8,501 || 2008 |- | 17 || || 8,370 || 2007 |- | 18 || || 7,842 || 2008 |- | 19 || || 7,467 || 2008 |- | 20 || || 7,200 || 2008 |- | 21 || || 7,100 || 2008 |- | 22 || || 6,215 || 2007 |- | 23 || || 5,279 || 2008 |- | 24 || || 4,600 || 2008 |- | 25 || || 4,068 || 2008 |- | 26 || || 4,000 || 2008 |- | 27 || || 4,000 || 2008 |- | 28 || || 3,997 || 2007 |- | 29 || || 3,760 || 2008 |- | 30 || || 3,500 || 2007 |- | 31 || || 3,219 || 2008 |- | 32 || || 3,200 || 2008 |- | 33 || || 3,100 || 2008 |- | 34 || || 2,900 || 2008 |- | 35 || || 2,800 || 2007 |- | 36 || || 2,500 || 2003 |- | 37 || || 2,400 || 2008 |- | 38 || || 2,400 || 2008 |- | 39 || || 2,250 || 2008 |- | 40 || || 2,250 || 2008 |- | 41 || || 2,220 || 2008 |- | 42 || || 2,176 || 2007 |- | 43 || || 2,052 || 2007 |- | 44 || || 2,043 || 2008 |- | 45 || || 2,000 || 2006 |- | 46 || || 1,800 || 2008 |- | 47 || || 1,770 || 2007 |- | 48 || || 1,731 || 2006 |- | 49 || || 1,622 || 2008 |- | 50 || || 1,608 || 2008 |- | 51 || || 1,600 || 2008 |- | 52 || || 1,600 || 2008 |- | 53 || || 1,577 || 2008 |- | 54 || || 1,500 || 2008 |- | 55 || || 1,300 || 2008 |- | 56 || || 1,300 || 2008 |- | 57 || || 1,300 || 2008 |- | 58 || || 1,293 || 2008 |- | 59 || || 1,200 || 2008 |- | 60 || || 1,200 || 2008 |- | 61 || || 1,200 || 2008 |- | 62 || || 1,120 || 2008 |- | 63 || || Turkmen Riverways || 2014 |- | 64 || || 1,000 || 2008 |- | 65 || || 1,000 || 2008 |- | 66 || || 990 || 2007 |- | 67 || || 980 || 2008 |- | 68 || || 956 || 2008 |- | 69 || || 900 || 2008 |- | 70 || || 850 || 2008 |- | 71 || || 825 || 2008 |- | 72 || || 800 || 2008 |- | 73 || || 800 || 2007 |- | 74 || || 785 || 2008 |- | 75 || || 730 || 2008 |- | 76 || || 700 || 2008 |- | 77 || || 664 || 2008 |- | 78 || || 636 || 2008 |- | 79 || || 600 || 2008 |- | 80 || || 600 || 2008 |- | 81 || || 587 || 2008 |- | 82 || || 580 || 2007 |- | 83 || || 470 || 2008 |- | 84 || || 465 || 2008 |- | 85 || || 460 || 2008 |- | 86 || || 441 || 2007 |- | 87 || || 424 || 2008 |- | 88 || || 400 || 2008 |- | 89 || || 390 || 2008 |- | 90 || || 358 || 2007 |- | 91 || || 330 || 2008 |- | 92 || || 320 || 2008 |- | 93 || || 300 || 2007 |- | 94 || || 300 || 2008 |- | 95 || || 240 || 2008 |- | 96 || || 210 || 2008 |- | 97 || || 209 || 2008 |- | 98 || || 203 || 2008 |- | 99 || || 200 || 2008 |- | 100 || || 172 || 2008 |- | 101 || || 160 || 2008 |- | 102 || || 150 || 2007 |- | 103 || || 65 || 2008 |- | 104 || || 50 || 2008 |- | 105 || || 43 || 2008 |- | 106 || || 37 || 2008 |- | 107 || || 28 || 2008 |- | 108 || || 6 || 2008 |- | 109 || || 5 || 2007 |}