Imperfect slope measurements drive overestimation in a geometric cone model of lake and reservoir depth
Imperfect slope measurements drive overestimation in a geometric cone model of lake and reservoir depth
复制标题
不完美的坡度测量导致湖泊和水库深度的几何锥模型中的高估
DOI:
10.1080/20442041.2021.2006553
复制
发表时间:
2022
期刊:
影响因子:
3.1
通讯作者:
Soranno, Patricia A.
中科院分区:
文献类型:
--
作者:
Stachelek, Jemma;Hanly, Patrick J.;Soranno, Patricia A.
Lake and reservoir (waterbody) depth is a critical characteristic that influences many important ecological processes. Unfortunately, depth measurements are labor-intensive to gather and are only available for a small fraction of waterbodies globally. Therefore, scientists have tried to predict depth from characteristics easily obtained for all waterbodies, such as surface area or the slope of the surrounding land. One approach for predicting waterbody depth simulates basins using a geometric cone model where the nearshore land slope and distance to the center of the waterbody are assumed to be representative proxies for in-lake slope and distance to the deepest point respectively. We tested these assumptions using bathymetry data from ∼5000 lakes and reservoirs to examine whether differences in waterbody type or shape influenced depth prediction error. We found that nearshore land slope was not representative of in-lake slope, and using it for prediction increases error substantially relative to models using true in-lake slope for all waterbody types and shapes. Predictions were biased toward overprediction in concave waterbodies (i.e., bowl-shaped; up to 18% of the study population) and reservoir waterbodies (up to 30% of the study population). Despite this systematic overprediction, model errors were fewer (in absolute and relative terms, irrespective of any specific slope covariate) for concave than convex waterbodies, suggesting the geometric cone model is an adequate representation of depth for these waterbodies. But because convex waterbodies are far more common (>72% of our study population), minimizing overall depth prediction error remains a challenge.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
B. Timms
通讯作者:
B. Timms
影响因子:
5.2
作者:
Cael, B. B.;Heathcote, A. J.;Seekell, D. A.
通讯作者:
Seekell, D. A.
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
D. Branstrator
通讯作者:
D. Branstrator
影响因子:
3.1
作者:
Oliver, Samantha K.;Soranno, Patricia A.;Stanley, Emily H.
通讯作者:
Stanley, Emily H.
DOI:
--
发表时间:
1958
期刊:
影响因子:
--
作者:
E. Gorham
通讯作者:
E. Gorham