The regional abundance and size distribution of lakes and reservoirs in the United States and implications for estimates of global lake extent
The regional abundance and size distribution of lakes and reservoirs in the United States and implications for estimates of global lake extent
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DOI：
10.4319/lo.2012.57.2.0597
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发表时间：
2012-03-01
影响因子：
4.5
通讯作者：
Striegl, Robert G.
中科院分区：
文献类型：
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作者：
McDonald, Cory P.;Rover, Jennifer A.;Striegl, Robert G.
我们分析了美国毗邻地区(不包括劳伦斯五大湖)面积超过0.001公里(2)的350万个湖泊和水库的完整地理空间数据，并确定了它们的区域分布特征。对于阿拉斯加，我们还分析了(1)不完整的数据，这些数据表明该州有100-250万个面积超过0.001公里的湖泊(2)覆盖面积超过50,000公里(2)；(2)局部的高分辨率(5米)数据表明，非常小的水体(0.001公里(2))的数量可能与某些地区的湖泊(0.001公里(2))的数量相当。帕累托分布不能准确地描述整个大小范围内的湖泊丰度-大小关系，而将这种密度函数外推到小尺寸类别可能会导致对世界上小湖泊数量的高估。虽然小水体在数量上占主导地位，但它们的数量还不够多，不足以像以前所说的那样在表面积上占主导地位。将我们的结果推广到全球范围，表明世界上有大约0.001千米(2)大小的水体，总表面积约为380万千米(2)。
We analyzed complete geospatial data for the 3.5 million lakes and reservoirs larger than 0.001 km(2), with a combined surface area of 131,000 km(2), in the contiguous United States (excluding the Laurentian Great Lakes) and identified their regional distribution characteristics. For Alaska, we also analyzed (1) incomplete data that suggest that the state contains 1-2.5 million lakes larger than 0.001 km(2) covering over 50,000 km(2) and (2) localized high-resolution (5 m) data that suggest that the number of very small water bodies (< 0.001 km(2)) may be comparable with the number of lakes > 0.001 km(2) in some areas. The Pareto distribution cannot accurately describe the lake abundance-size relationship across the entire size spectrum, and extrapolation of this density function to small size classes has likely resulted in the overestimation of the number of small lakes in the world. While small water bodies dominate in terms of numbers, they are not numerous enough to dominate in terms of surface area, as has been previously suggested. Extending our results to the global scale suggests that there are on the order of 64 million water bodies larger than 0.001 km(2) in the world, with a total surface area of approximately 3.8 million km(2).