Reply to Comment by Desmet and Govers

Mitášová, Helena; Hofierka, Jaroslav; Zlocha, Marian; Iverson, Louis R.

doi:10.1080/136588197242220

Cited by 13 publications

(4 citation statements)

References 2 publications

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“…These lumped-response models ignore location-specific effects caused by spatial variability of soil and hydrological characteristics and neglect transport and sedimentation processes (Mitasova et al, 1997). The Universal Soil Loss Equation, USLE (Wischmeier and Smith, 1978), is the most widely used in national and regional exercises (e.g.…”

Section: Coarse-scale Modelling Of Land Degradationmentioning

confidence: 99%

How good is GLASOD?

Sonneveld

Dent

2009

Journal of Environmental Management

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Section: Coarse-scale Modelling Of Land Degradationmentioning

confidence: 99%

How good is GLASOD?

Sonneveld

Dent

2009

Journal of Environmental Management

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“…Beven (1999) also found that parameter identification fails and different sets gave equally acceptable fits to observed data, but for entirely different reasons, implying that land degradation models have a limited scope as policy tools. Use of empirical models is also restricted because they lack a rigorous grounding on theory and have to rely on statistically significant relationships that are derived from a particular data set (Mitasova et al, 1997). Therefore, these empirical models cannot be extrapolated beyond their data domain with confidence, either to more extreme events or to other geographical areas (Wischmeier, 1976).…”

Section: Introductionmentioning

confidence: 99%

Comparing Rainfall Use Efficiency Trends with Expert Judgments for Nation-Wide Land Degradation Assessments: The Case of Senegal

Sonneveld¹,

Bai²,

Ndiaye³

et al. 2012

JSD

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This study compares the results of two nationwide land degradation assessments for Senegal. The first approach is based on expert judgments, the second on trend analyses of Rainfall Use Efficiency (RUE). The comparison yields some interpretable results for extreme negative RUE slope values with maximum degrees of land degradation as indicated by experts, yet, overall, the correlation between both approaches proves to be low and without clear sign. As RUE trend analysis suffers from several inherent methodological problems and expert judgments are found to be consistent we consider expert opinions as the preferable option for a nation-wide land degradation assessment in Senegal. Yet, we argue that methodological improvements would increase the explanatory power of the expert approach and consolidate its position in a policy making framework.

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“…Thus, at landscape or watershed scales, the spatial distribution of soil erosion as predicted by these models misrepresents actual conditions, and tends to overestimate erosion on the entire watershed [7,8]. The only practical way to apply the models is to identify a priori those portions of the landscape subject to deposition and exclude them from analysis [9].…”

Section: Introductionmentioning

confidence: 99%

Validation of the Unit Stream Power Erosion and Deposition (USPED) Model at Fort Hood, Texas

2019

JSPB

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Soil erosion has been recognized as a significant environmental malady in the United States for over 200 years. Numerous attempts have been made to model and quantify the issue, yet significant issues remain that hinder the accuracy and effectiveness of such models. This manuscript describes an attempt to model soil erosion and concomitant sedimentation with the Unit Stream Power Erosion and Deposition (USPED) model at an active military training installation. The model accurately determined both soil erosion and sediment deposition on a spatial basis at 83% of 60 randomly assigned points where model estimates were compared to visual estimates. While not perfect, the USPED model estimates exceeded a predetermined threshold of 80% established, recognizing that model estimates represent long-term estimates while visual estimates are based on recent conditions only.

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Reply to Comment by Desmet and Govers

Cited by 13 publications

References 2 publications

How good is GLASOD?

How good is GLASOD?

Comparing Rainfall Use Efficiency Trends with Expert Judgments for Nation-Wide Land Degradation Assessments: The Case of Senegal

Validation of the Unit Stream Power Erosion and Deposition (USPED) Model at Fort Hood, Texas

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