Assessment of soil infiltration capacity by using portable rainfall simulator

Under study was the possible assessment of soil infiltration capacity by using a portable rainfall simulator to irrigate a small area and avoid the development of rill erosion. For soil infiltration capacity an equation has been suggested, including erosion rain index AI as a criterion of similarity. The equation was verified for natural rainfalls (for catchments and runoff plots) and for artificial rain (for a runoff plot 5 m long and 5 m² in size). To evaluate the soil infiltration capacity, the small runoff plots can be used, on which no rill erosion doesn’t take place. To verify this affirmation two experiments were conducted. In the first experiment a large rainfall simulator and a runoff plot 3 m long having the area 3 m² in the field were used. Rill erosion took place on this runoff plot. In the second experiment a portable rainfall simulator and a runoff plot shaped as a circle with the area 0.05 m² were used (rill erosion did not take place). The experiment was conducted in the laboratory by using the soil monoliths taken in the same field. For both rainfall simulators the raindrops were of the same size, they fell down from the same height, the rainfall intensity was constant, but the values of these parameters seemed to be different. In experiments a close dependence between the soil infiltration capacity and the index AI was established. The use of the portable rainfall simulator requires expenses to a lesser extent.

естественные и искусственные дожди, критерий подобия, инфильтрация, стоковые площадки, чернозем, natural and artificial rains, criterion of similarity, infiltration, runoff plots, chernozem

1. Вытовтов В.А., Сухановский Ю.П., Прущик А.В., Санжарова С.И. Лабораторно-полевая дождевальная установка. Пат. РФ № 2417578. 2011.

2. Вытовтов В.А., Сухановский Ю.П., Санжарова С.И., Прущик А.В., Соловьева Ю.А. Портативная лабораторно-полевая дождевальная установка. Пат. РФ № 2519789. 2014.

3. Сухановский Ю.П. Вероятностный подход к расчету эрозионных потерь почвы // Почвоведение. 2013. № 4. С. 474-481. DOI: 10.7868/S0032180X13040138.

4. Сухановский Ю.П. Зависимость инфильтрации от эрозионной характеристики дождя // Почвоведение. 2003а. № 10. С. 1248-1257.

5. Сухановский Ю.П. Модификация методики дождевания стоковых площадок для исследования эрозии почв // Почвоведение. 2007. №2. С. 215-222.

6. Сухановский Ю.П., Оллеш Г., Хан К.Ю., Майснер Р., Роде М., Волокитин М.П., Сон Б.К. Применимость универсального уравнения потерь почвы от эрозии (USLE) для условий Европейской территории России // Почвоведение. 2003б. № 6. С. 733-739.

7. Sukhanovski Y.P., Ollesh G., Khan K.Y., Meisner R. A new index for rainfall erosivity on a physical basis // J. Plant Nutrition Soil Science. 2002. Vol. 165. P. 51-57.

8. Wischmeier W.H., Smith D.D. Predicting rainfall erosion losses // Agricultural handbook. No. 537. Washington. 1978. 65 р.

9. Young R.A., Onstad C.A., Bosch D.D., Anderson W.P. AGNPS, Agricultural Non-Point-Source Pollution Model. A Watershed Analysis Tool. U.S. Dept. of Agr. Conservation Research. Report 35. 1987. 80 p.

10. Zingg A.W. Degree and length of land slopes as it affect soil loss in runoff // J. of Agric. Engineers. 1940. V. 21(2). P. 59-64.