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The Federal State Budgetary Scientific Institution "Central Scientific Agricultural Library" (CSAL) is the oldest Bibliographic Center for Agricultural Science and Food Industry in the Russian Federation. The library was founded in 1930. More than 3 million items are stored in the library collection. Since 1992, CSAL has been managing AGROS, the largest agricultural database in Russian in the world. This database contains information about books and articles published both in Russian and foreign periodicals or serial editions (the annual increm [...]

Actif (Le fournisseur de données a soumis des métadonnées au cours de la dernière année civile)

Article de revue

# Agricultural landscapes modeling  [2014]

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The modeling of the spatio-temporal changes in the agricultural landscapes relief is considered for assessment and prediction of the erosion processes. Most of the ravine profiles of the slopes is in the S-shaped form curve, which with a high correlation coefficient (more than 0.995 ) is described by the logistic function in the normalized values: h(l)=100/1+A*exp(B*l+C), where h (l) is current height profile, % ; A is a coefficient determining the position of the center of mass "Height - Length - Form of the slope" ; B, C are the coefficients, that determine the shape and slope of the curve ; l is the width of the cross section profile, %. The study of the slope shape dynamics change showed, that the dependence of the coefficients B and C of the normalized periods of time is linear: Bi = B0 - (0.033 t), Ci = C0 + (2.59 t), where t = 0,1,2 ... i ; B0 = 0.434; C0 = - 35. The coefficient A is constant and equals to 69.7. Given the above assumptions, the original equation can be written as: h(l)=((100-5t)/(1+69.7*exp(0.434-0.033t)*l+(2.59t-35)))+5t. The first derivatives of the logistic function sectional profile along the length of the slope in time periods t show the change in the position of the inflection points on the curves that define the change in the intensity of the erosion process. Modeling of the slope using the refined formula of its shape changes provides a definition of the boundaries of the slope erosion dangerous areas and the possibility of
computational methods to determine the optimal placement of erosion control plantings or devices for the protection of agricultural landscapes.
(Revue
Proceedings of the Lower Volga Agricultural University Complex: Science and Higher Professional Education
ISSN : 2071-9485

Information bibliographique

Langue:
Russian
Type:
Journal Article
Sur AGRIS depuis:
2015
Numéro:
234
Page initiale:
14
Page finale:
18
Tous les titres:
"Оценка и прогноз эрозии"@rus
"Agricultural landscapes modeling"@eng

Information bibliographique

Langue:
Russian
Type:
Journal Article
Sur AGRIS depuis:
2015
Numéro:
234
Page initiale:
14
Page finale:
18
Tous les titres:
"Оценка и прогноз эрозии"@rus
"Agricultural landscapes modeling"@eng