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The Central Scientific Agricultural Library of the Russian Academy of Agricultural Sciences is a Bibliographic Center for Agricultural Science and Industry in the Russian Federation.

مقال مجلة

# Agricultural landscapes modeling  [2014]

### استعراض النص الكامل

• NOT AVAILABLE
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.

### المجلة

Proceedings of the Lower Volga Agricultural University Complex: Science and Higher Professional Education
الرقم التسلسلي المعياري الدولي (ردمد) : 2071-9485

معلومات ببليوغرافية

اللغة:
Russian
النوع:
Journal Article
في أجريس منذ:
2015
الإصدار:
234
صفحة البداية:
14
صفحة النهاية:
18
جميع العناوين:
"Оценка и прогноз эрозии"@rus
"Agricultural landscapes modeling"@eng

معلومات ببليوغرافية

اللغة:
Russian
النوع:
Journal Article
في أجريس منذ:
2015
الإصدار:
234
صفحة البداية:
14
صفحة النهاية:
18
جميع العناوين:
"Оценка и прогноз эрозии"@rus
"Agricultural landscapes modeling"@eng