最终流入内陆湖泊或在内陆断流的河流叫内流河，而内流河所在的区域为内流区。中国的内流区面积约占全国陆地总面积的36%。我国的内流流域多分布在西北地区和青藏高原中北部干旱气候区。
黑河山区流域径流系数远比干旱内流区的平均值大，但要小于全国的平均径流系数。
In the mountainous watershed of the Heihe River, the runoff coefficient is much larger than that of the whole arid area, but it is still less than the average value over the whole country.
周围的属于红河的流域，但是由于魔鬼湖流域是封闭的内流区，必须使湖面水位达到足够的高度，水才能流到其他地方。
The surrounding basin is that of Red River, but because Devils lake's own basin is closed, the lake must reach a sufficient water level before the water travels elsewhere.
本文运用商用流体动力学软件CF X数值模拟了非加热区对窄缝流道内流场和温场的影响。
With the commercial computational fluid dynamics code CFX, the effect of unheated region of narrow side on flow field and temperature field of a narrow channel is simulated in this paper.
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