Annotation

Purpose: to determine special features of changes in the geometric and moisture parameters of the soil drip moisture contours after irrigation. 

Materials and methods. The basis for generalizations on the dynamics of moisture contours transformation was the results of field studies conducted on three experimental plots, the top soil of which is represented by medium-thick southern chernozem, characterized by the content of physical clay Wг equal to 45.0; 52.5 and 70.2 % by dry soil weight. Measurements of contour parameters were carried out in 0, 12, 24, 36, 48, 72 and 96 hours after completion of drip irrigation during post-irrigation period. 

Results and discussion. An analysis of the shape and geometric dimensions of the contours and internal contour isopleths, recorded in post-irrigation periods of different duration, made it possible to determine the qualitative features of their change over time. An increase of the linear, areal and volumetric dimensions of moisture contours over a certain time period, stabilization and their subsequent decrease, up to the complete contour drawdown, has been defined. Of all the variety of factors influencing the process of contour transformation, soil conditions determined by soil granulometry are considered as the main ones. An empirical dependence that describes the functional relationship between the linear parameters of the contours, the content of physical clay in the moistened soil profile, and the duration of the post-irrigation period has been obtained. 

Conclusions. Based on the field study data, the qualitative-quantitative parameters of transformation of the drip soil moisture contours in the post-irrigation period, typical for southern chernozems of medium-thick light clay, medium and heavy loam, were determined. The predicted parameters of drip soil moisture contours were compared with the known data, allowing to make a conclusion about their acceptability for practical application in the development of drip irrigation regimes for agricultural lands. 

doi: 10.31774/2712-9357-2023-13-3-69-86

For quoting

Shtanko A. S., Shkura V. N. On transformation of drip soil moisture contour in after-irrigation period. Land Reclamation and Hydraulic Engineering. 2023;13(3):69–86. (In Russ.). https://doi.org/10.31774/2712-9357-2023-13-3-69-86.

Bibliography

1. Borodychev V.V., Krivolutskaya N.V., Krivolutsky A.A., Strizhakova E.A., 2017. Produktivnost' yablonevogo sada intensivnogo tipa na kapel'nom oroshenii [Productivity of intensive apple orchard on drip irrigation]. Glavnyy agronom [Chief Agronomist], no. 3, pp. 8-14. (In Russian).

2. Lytov M.N., 2020. Osobennosti primeneniya differentsirovannykh rezhimov vodoobespecheniya pri kapel'nom sposobe orosheniya [Features of differentiated water supply modes application with drip irrigation method]. Puti povysheniya effektivnosti oroshaemogo zemledeliya [Ways of Increasing the Efficiency of Irrigated Agriculture], no. 2(78), pp. 54-60. (In Russian).

3. Pronko N.A., Korsak V.V., Kadnova Yu.Yu., Filippova M.Yu., 2020. Raschet polivnykh norm pri kapel'nom oroshenii v usloviyakh sukhostepnogo Zavolzh'ya [Calculation of irrigation norms for drip irrigation under the conditions of the dry steppe Trans-Volga]. Osnovy ratsional'nogo prirodopol'zovaniya: materialy VI Nats. konf. s mezhdunar. uchastiem [Fundamentals Rational Nature Management: Proc. of the VI National Conf. with International Participation]. Saratov, pp. 55-59. (In Russian).

4. Karimi B., Karimi N., Shiri J., Sanikhani H., 2022. Modeling moisture redistribution of drip irrigation systems by soil and system parameters: regression-based approaches. Stochastic Environmental Research and Risk Assessment, 36, pp. 157-172, https:doi.org/10.1007/s00477-021-02031-y.

5. Solat S., Alinazari F., Maroufpoor E., Shiri J., Karimi B., 2021. Modeling moisture bulb distribution on sloping lands: Numerical and regression-based approaches. Journal of Hydrology, 601, 126835, https: doi.org/10.1016/j.jhydrol.2021.126835.

6. Ovchinnikov A.S., Bocharnikov V.S., Meshcheryakov M.P., 2012. Metodika rascheta i obosnovanie parametrov kontura uvlazhneniya v usloviyakh otkrytogo i zakrytogo grunta [The calculation method and substantiation of moisture contour parameters under the conditions of the open and closed ground]. Prirodoobustroystvo [Environmental Engineering], no. 4, pp. 10-14. (In Russian).

7. Akhmedov A.D., Galiullina E.Yu., Temerev A.A., 2011. Dinamika uvlazhneniya pochvy pri kapel'nom uvlazhnenii sadov [Dynamics of soil moistening during drip irrigation of gardens]. Izvestiya Nizhnevolzhskogo agrouniversitetskogo kompleksa: nauka i vysshee professional'noe obrazovanie [Proceedings of Lower Volga Agro-University Complex: Science and Higher Education], no. 2, pp. 159-164. (In Russian). 

8. Dubenok N.N., Gemonov A.V., Lebedev A.V., Efimov O.E., Prokhorov A.A., 2021. Agrokhimicheskie i vodno-fizicheskie svoystva dernovo-podzolistoy pochvy pri kapel'nom oroshenii plodovogo pitomnika [Agrochemical and water-physical properties of sod-podzolic soil under drip irrigation of a fruit nursery]. Ovoshchi Rossii [Vegetable Crops of Russia], no. 3, pp. 116-121, https:doi.org/10.18619/2072-9146-2021-3-116-121. (In Russian).

9. Dubenok N.N., Gemonov A.V., Lebedev A.V., Efimov O.E., Prokhorov A.A., 2022. Properties of sod-podzolic soil in European Russia with drip irrigation of the fruit nursery. IOP Conference Series: Earth and Environmental Science. Dushanbe, 1010, 012108, DOI: 10.1088/1755-1315/1010/1/012108.

10. Shtanko A.S., Shkura V.N., 2017. Izmenenie parametrov lokal'nykh konturov kapel'nogo uvlazhneniya pochv v postpolivnoy period [Changes in the parameters of local contours of drip soil moisture in the post-irrigation period]. Puti povysheniya effektivnosti oroshaemogo zemledeliya [Ways of Increasing the Efficiency of Irrigated Agriculture], no. 2(66), pp. 227-233. (In Russian).

11. Shchedrin V.N., Balakay G.T., Dokuchaeva L.M., Yurkova R.E., Shalashova O.Yu., Tabala G.I., 2017. Rukovodstvo po kontrolyu i regulirovaniyu pochvennogo plodorodiya oroshaemykh zemel' [Guidelines for Control and Regulation of Soil Fertility of Irrigated Lands]. Novocherkassk, RosNIIPM, 137 p. (In Russian).