Irrigation Erosion Research Articles

Investigation of Irrigation Erosion in Pseudopodzol Yellow Soils of the Lankaran District

Inclination, length, form and exposition of the slopes affect the irrigation erosion process in the Lankaran district. The artificial rain in a different intensity was created in the tea plantations of the experiment farm of the tea and citrus plants in Lankaran branch in order to study a reason of the surface washing creation in irrigation erosion of the tea plantations more accurately. It was known that a tea plantation in which the rows were built along the slope in 1975, the liquid flow was 125.0 m3/ha, while the rain intensity was 1.0 mm/min., the liquid dissolved dissolved substances flow was 240.0 m3/ha, 2.90 t/ha in the tea plantations built in 1990, while an amount of the leached soil was 0.80 t/ha. Firstly, conduction of the surface smoothing work is recommended in order to prevent from irrigation erosion in irrigated areas with a slope more than 0.02°. Generally, the surface smoothing work is fundamental and current, and it is divided into two places. The current smoothing work begins from preparation of soil for sowing every year and this measure doesn’t require more funds. The fundamental smoothing work is performed for fundamental smoothing of the irrigated sowing areas. At this time an inclination of the areas shouldn’t be more than 0.01. It is recommended to conduct the fundamental smoothing work, then current smoothing work in the areas where the inclination is more than 0.01. Fight against irrigation erosion, definition of the water and irrigation norm, water consumption and realization in the irrigated areas are main problems. The irrigation norm should be determined before for each plant watering. Beside the aforesaid, the technical means (pipes that are made from different materials), including different brands (Fregat, Kuban, KSID-50, Volzhanka, DDA-100 M and so on) rainmaker aggregates, various progressive irrigation methods (artificial precipitation, subsoil irrigation, drip watering, aerosol irrigation, etc.) should be used.

Assessing the intensity of reduction and restoration of irrigated lands’ state in the Republic of Bashkortostan

AbstractBackgroundIrrigation of lands over time leads to such negative processes as land salinization and waterlogging, reduction of soil fertility, changes in the chemical composition of groundwater, and the emergence of linear and irrigation erosion. The land improvement (ameliorative) categories adopted in Russia and several post‐Soviet countries determine their suitability for agricultural use and the focus of measures to preserve potential soil fertility.AimsThe study aims to build a mathematical model to assess the intensity of the reduction and restoration of irrigated lands’ state in the Republic of Bashkortostan.MethodsThe methods of the theory of random processes are proposed to estimate the intensity of reduction and restoration of irrigated lands’ state on the territory of the Republic.ResultsAs a result of the calculations, the values of intensities characterizing changes in the state of land in the region were obtained. The practical significance of the developed model consists of the possibility of short‐term forecasting and determination of the necessary intensity of land quality restoration taking into account planned values during the given period.ConclusionsThe offered indicator of intensity and the method of its definition can be used in research of similar processes proceeding on agricultural lands within the limits of large spatial units.

First evidence of widespread, severe soil erosion underneath centre-pivot irrigation systems

Centre-pivot systems are widely used for irrigation in agriculture. However, excessive water application rates under low pressure centre-pivot systems can lead to soil erosion, which degrades soil structure and increases crop vulnerability to droughts. Although efforts have been deployed to measure soil erosion underneath individual centre pivots, a large-scale systematic assessment of extent and severity of soil erosion in centre-pivot irrigated fields is currently lacking. Here we used Google Earth™ satellite images to provide first evidence of widespread, severe soil erosion in centre-pivot irrigated agricultural land. We focused on the municipality of Cristalina (6154 km2), in the Brazilian Central Highlands, where centre pivots irrigate approximately 60,000 ha of cropland. The study area is in the Cerrado biome, which is one of the most important grain-producing regions in the world and Brazil's main centre-pivot irrigation area. By mapping erosion features under centre pivots, we found that 29 % of centre-pivot fields displayed signs of rill erosion, with individual rills up to a length of 1200 m. Most erosion features were identified during the dry season of the Brazilian Cerrado, which coincided with the period of greater satellite-image availability. Moreover, we found that compacted centre-pivot-wheel tracks often triggered rill incision and that eroding centre-pivot fields displayed higher slope gradients and were better connected to surface waters than the non-eroding fields. Ultimately, the frequent identification of severe erosion features in the centre-pivot fields during the dry season indicates that irrigation causes and/or aggravates soil erosion in Cristalina and likely in other parts of the Brazilian Cerrado. This first systematic evidence of widespread soil erosion underneath centre-pivot systems highlights that irrigation erosion is an important but neglected driver of land degradation, and that urgent action is required to protect affected soils for future generations.

Ways to achieve water economy in the application of water-saving technologies against irrigation erosion in hilly lands

In order to ensure sustainable water supply to the population and all sectors of the economy in 2020-2030, to improve the reclamation of irrigated lands, to widely introduce market principles and mechanisms and digital technologies in water management, to ensure reliable operation of water facilities and increase land and water resources efficiency At the initiative of President Sh. Mirziyoyev, the main goal is to supply every drop of water on the basis of the normative limit for crops. Resolution of the President of the Republic of Uzbekistan No. PP-4499 of October 25, 2019 “On measures to expand mechanisms to encourage the introduction of water-saving technologies in agriculture” and the Resolution of the President of the Republic of Uzbekistan dated July 10, 2020”. The application of irrigation technologies in the hills is effective, irrigation is carried out on the basis of modern technology, measures to combat irrigation erosion are identified. Therefore, ways to prevent leaching of the fertile layer of soil in water-saving technologies have been studied in this article. These experiments were carried out on the farm “Umid” Zangiota district, Tashkent region, using water-saving technologies to increase the efficiency of grain crops on hilly lands, in 2019-2021 on the area of irrigation erosion. In order to increase grain yield, 100 m, 150 m, 200 m long fields were irrigated with zigzag furrows using K-9 polymer. professor Qambarov B.F., t.f.d. Professor Baraev F.A. Based on the recommendations, 8-factor experiments were conducted to prevent leaching of the fertile layer of soil. Yields increased from 30-35 quintals to 60-68 quintals. The number of swimmers has decreased by 5-6 compared to the previous one. Development of the effectiveness of engineering technology to protect the active layer of the soil from irrigation erosion. The main goal is to prevent the washing of the active layer of soil by the use of water-saving anti-erosion technologies (zig-zag), water-saving K-9 polymer in typical gray soils with old irrigated erosion, as well as high-quality grain from winter wheat “Kroshka”. The main purpose of the application of new technologies to protect the soil from irrigation erosion is to prevent the erosion of the fertile layer of the soil, to improve the water regime, to maintain the water regime, to determine the period of active root irrigation and, above all, grain irrigation.

The Effect of Irrigation Erosion on the Agrochemical Characteristics of Mountain-Brown Soils, and the Productivity of Cereals - Legumes

The Effect of Irrigation Erosion on the Agrochemical Characteristics of Mountain-Brown Soils, and the Productivity of Cereals - Legumes

Application of water-saving irrigation technologies of intensive apple orchards in the irrigated regions of Uzbekistan

In this article, the purpose of the research is to improve the method of irrigation of intensive apple orchards, determining the rate and duration of irrigation, determining seasonal water consumption, and calculating water rates. When intensive apple orchards are irrigated on the basis of water-saving technologies, it is observed that the trees use soil moisture, atmospheric precipitation, and the efficiency of using irrigation water. As a result, it has been proven that seasonal water consumption can be saved from 12% to 52% compared to furrowlab irrigation. In this case, it was noted that the use of transverse barrier furrows in the conditions of soils prone to irrigation erosion reduced soil particle leaching by 31-51%, irrigation water by 17-25% and increased productivity by 22-28%. Also, it was observed that the fruit quality improved, the weight of one apple increased by 36 g, and the yield increased by 7.3 tons/ha. Intensive orchards irrigated with 75-80-70% relative humidity relative to LFMC have been reported to have 30-65% higher yields than controls.

Improving cotton irrigation methods in erodible soils of Tashkent province, Uzbekistan

Agricultural degradation areas are increasing worldwide. From them, 56% due to water erosion, 28% due to wind erosion, 12% due to soil nutrient depletion, salinization, pollution processes, and 4% due to densification, swamping, and subsidence processes. As a result of such negative processes and the existence of the water shortage problem in 80 countries of the world, 7 million hectares of arable land are withdrawn from agricultural use every year, and the problem of food security is arising in the world. In this article, the results of scientific research and cost-effectiveness calculations on 3 different slopes of cultivated fields on soils prone to irrigation erosion are written. In Uzbekistan, great attention is paid to solving the problems of improving land reclamation and increasing the productivity of irrigated lands. In the Action Strategy for the further development of the Republic of Uzbekistan in 2017-2021, it is stated that “... further improvement of the reclamation condition of irrigated lands, development of the network of reclamation and irrigation facilities, wide introduction of intensive methods of agricultural production, first of all, modern water and resource-saving agrotechnologies, highly productive tasks on the use of agricultural machinery” are defined. It is necessary to develop new technologies for effective methods of increasing the productivity of lands prone to irrigation erosion in order to implement part of the specified tasks.

Theoretical study of the influence of the changing environment on the process of rainfall irrigation

The technology of sprinkler irrigation has a higher coefficient of land use compared to that of regular irrigation, due to the absence of irrigation erosion, the prevention of unnecessary absorption of water into the soil, the high degree of mechanization and automation of the irrigation process, the saving of equipment and fuel costs, the availability of irrigation in areas with uneven relief, the uniform moistening of the root layer. It has the advantage of achieving the same growth and development of the plant in all parts of the field. At the same time, there are opportunities to achieve savings as a result of giving mineral fertilizers in the form of suspension during irrigation. This article examines the distribution of water droplets on the field surface during sprinkler irrigation and the influence of wind speed on the intensity of irrigation. Water drop motion and wind motion were analyzed in one coordinate system. As a result, a mathematical model of the resistance coefficient of the environment and the movement of a water droplet in a variable environment was developed.

The effectiveness of use of water-saving technologies against erosion in hilly areas land

Reducing irrigation erosion is one of the major challenges in the world today. Particular attention is paid to the development and maintenance of soil fertility and the development of irrigation water-saving technologies. Soil erosion due to over-irrigation of arable land on farms leads to increased fertilizer consumption and decreased productivity. The washing of the fertile layer of soil not only affects the yield of crops but also affects the mechanical composition of the soil. Erosion destroys the natural topsoil, and a reduction in organic matter accompanies this. When erosion occurs, soil particles are lost, and organisms, mineral fertilizers, and nutrients are lost along with them. Currently, the average soil washing before irrigation in such an area is 51 t/ha per year, of which nutrients are: humus 590 kg/ha, nitrogen, and phosphorus -50 and 82 kg/ha, potassium 140 kg/ha, and small elements 33 kg/ha. e. Of these, 600 thousand are currently strongly washed soils - 39 thousand, average washed - 215 thousand, and weakly washed soils - 346 thousand. As a result of soil washing and lowering the quality of wetting of sloping lands, the gross yield of 28-47 % decreases in crop areas. Resolutions decree of the President-4919 of December 11, 2020, “On measures to further accelerate the introduction of water-saving technologies in agriculture”, as well as Resolution No. PF-6024 of July 10, 2020, of the President of the Republic of Uzbekistan The program of decrees “Concept for 2030” is being implemented. With economic irrigation technology using K-9 polymer in furrow irrigation, the water use coefficient in irrigation changed from 0.78 to 0.87 in furrows, from 0.7 to 0.76 under control. The water economy during the irrigation season is 400-878 m3/ha. Fuel economy in plowing was 3-4 liters per hectare. The number of swimmers has halved. K-9 polymer using furrow irrigation increased yields from 28.4 to 68.4 and 70 quintals per hectare.

Особенности ирригационной эрозии Западной Сибири (на примере Новосибирской области)

Taking into account the regional features of irrigated soils in Western Siberia, on the basis of an assessment of natural water erosion, irrigation erosion is considered and a "transect-caten" method is proposed for its identification, assessment and monitoring.

Drop Size Distribution and Effective Determination of the Constitution of Throughfall Droplets under Maize Canopy

AbstractSprinkler irrigation has dominated the irrigation erosion, and droplet diameter is an important determinant. To clarify the influence of maize canopy and sprinkler droplets landing angle on drop size distribution, distribution trend, and throughfall droplets diameters, the information on droplet size and velocity are collected via 2D‐video‐disdrometer. The results showed that due to the presence of maize canopy and the decrease in landing angle, the proportion of the tiny droplets (<2 mm) within throughfall increased. Throughfall droplet size distribution under maize canopy exhibited a distinct bimodal trend, however, the new droplet volume ratio is greater when the droplet size is smaller. In addition, the trend‐line of throughfall droplet size distribution gradually shifted toward the origin as the landing angle decreased. Because of maize canopy and gradual decrease in the landing angle, throughfall droplets diameters decreased. When the droplets are <2 mm, their volume proportion is greater than that in the absence of maize canopy because of the fragmentation of large droplets. Affected by the convergence of small droplets on maize leaves, the diameter of drips generated from maize leaves in this study probably ranged from 2–5 mm. Drops >5.01 mm maight have originated from direct throughfall.

Эрозионно-допустимые нормы полива на южных черноземах при дождевании

The currently existing traditional approach to calculating the water consumption of agricultural crops is based on a shortage of soil moisture, in which the irrigation rate is determined taking into account the degree of desiccation of the soil at the time of irrigation, its water-physical properties, the depth of soaking and irrigation techniques. The subsequent determination of the elements of sprinkling irrigation technique is based on the obtained irrigation rate without taking into account the strength properties of the soil, its resistance to the effects of artificial rain energy, as well as the possibility of erosion processes. However, the practice of sprinkling irrigation in various climatic zones of the country shows that one of the main problems of sprinkling is the formation of surface, uncontrolled water runoff during irrigation, which leads to irrigation erosion of the soil, loss of water to runoff and deep focal infiltration, which, in turn, worsens the reclamation condition of the irrigated area, and ultimately – to a significant decrease in the effectiveness of sprinkling and its environmental safety. The methodology for assessing the use of sprinkler devices depending on soil conditions, based on comparing the average intensity (layer) of rain with the rate of absorption (layer) of absorbed water during the irrigation period in one position does not exclude these negative consequences during sprinkling. It is established that when justifying erosion-permissible irrigation norms, the indicator of free (nonpressure) water permeability, which depends on the size of raindrops and its intensity, should be used as a criterion for assessing water absorption into the soil.

Gray-grass in the Shirvan plain effects of irrigation erosion on agrochemical indicators of land

Gray-grass in the Shirvan plain effects of irrigation erosion on agrochemical indicators of land

Analyze of Dynamics and Degree of Anthropogenic Impacts on the Ecogeomorphological Conditions (Case Study of the Kura-Araz Lowland and Surrounding Areas)

Theoretical base of human effects on geomorphological environment, the evolution of anthropogenic impacts and modern situation of human activity were analyzed in the studied area. On the base of supervised and unsupervised classification of the Landsat images (1976–2017) Land use-Land cover map of the territory was compiled. The dynamic and transformation of land covers were determined with the change detection function. It was defined that the most increasing land cover in the area of transformation since 1976 to 2017 is the sown area. Due to the anthropogenic development of the study area, the largest decrease in the area of exposed (33,85%) and saline (25,43%) land cover occurred during this period. Among the listed anthropogenic factors (oil and gas production, production of building materials, grazing, settlements, etc.), it is established that irrigation erosion has a wide radius of encirclement and a high degree of influence. With the application of Geographic Information System technologies, on the base of remote sensing data the density of the irrigation network has been computed and mapped. Ecogeomorphological assessment and zoning of the territory has been carried out. According to the comparative analysis of horizontal (stream network) and anthropogenic (irrigation network) fragmentation it was determined that the estimated maximum cost of anthropogenic fragmentation in the study area is 2,5 times higher than natural horizontal fragmentation.

Some Problems On Erozon Protection Of Soils in Azerbaijan

430 mkn.ha of land has been damaged by erosion processes in different countries around the world. Surface, cleavage and irrigation erosion is also widespread throughout the country. 43.29% of the total area is subjected to varying degrees of erosion. In some regions, especially the Nakhchivan AR, erosion processes cover 70% of the area. 66.6 of the total area of the southern slope of the Greater Caucasus has been eroded. In some areas of the country, the percentage of eroded farms is high. This figure is 51% in Lachin-Kalbajar zone, 57.9% in Guba-Khajmaz zone and 72.4% in Sheki-Zagatala. The newly formed splinters break down the farmland into small parts and make them useless. The following erosion intensity scale is presented. 1) net wash-up to 0.5 t / ha, 2) poor wash-up to 0.5 t / ha, 3) moderate washing 1-5 t / ha, 4) severe washing -5-10 t / ha, 5) very severe washing -10 t / ha. Different geographical areas of the country have also been identified the possible distances between stripes on different slopes. Soil preparation should be carried out with a strip of 1–2 m in every 3–5 m in areas of 10–200 incidence, moderate to severe, and 1.5–3 m wide in each of the 2–3 m in severely washed areas of 20–300 m. trench to be dug. In large areas with more than 15-200 thick, thick soils and where the tractor can operate, deforestation should be carried out on terraces. On the slopes where heavily washed and often rigid rocks are exposed, soil preparation can be used to make yards and ditches.

Изменение противоэрозионной стойкости орошаемых серо-коричневых почв сухой субтропической зоны Азербайджана в зависимости от давности их орошения

Изменение противоэрозионной стойкости орошаемых серо-коричневых почв сухой субтропической зоны Азербайджана в зависимости от давности их орошения

The effect of irrigation erosion on the agrochemical characteristics of mountain gray-brown soils and the production of cereals and legumes (In the example of Khizi region)

Taking all these into account, it is important to increase the fertility of the soil from the erosion process in Ismayilli and to prevent the washing of fodder crops from perennial herbs. The cultivation of these plants in the mountainous regions protects the slopes from the terrible erosion process and provides the animals with a strong fodder. It is proved by the results of the research that restoration of fertility and ecological balance of erosion lands and the implementation of soil-agro-technical measures to increase productivity are of great importance. Due to the application of these measures, I,as a result of improving the water and physical properties of the affected land, prevent surface water flows. In addition, the results of the study have been proven by the fact that, for certain reason, erosion and erosion hazards are most likely to be taken over by the sowing of perennial herbs. Thus, perennial herbs, in particular, accumulate the nitrogen atmosphere of the legumes, enriches the soil with organic matter, accelerates the formation of water-resistant granular - topical structure and improves its water-physical properties, which in turn facilitates the rapid digestion of foodstuffs.

The Effectiveness of The Application of Comprehensive Measures To Combat Erosion Using Irrigation In A Market Economy In Azerbaijan (On The Example Of The Kur-Araks Plain)

Studies in the article have shown that productivity increases with improved structure. This is explained by the fact that in soils with 0.25 mm diameter water-resistant aggregates of 14%, grain yield is 22.2 cents / ha, while water-resistant aggregates are 8%. In soils, this figure decreased to 18.4 cents / ha (3.8 cents / ha). It is also known that alfalfa plays a key role in improving the water-physical properties of the soil, as well as its agrochemical composition. The author's research shows that the amount of water-resistant aggregates under the clover is much higher than in the cotton fields. This can be clearly seen from the following comparison. Thus, the amount of water-resistant aggregates in 0-10 cm of soil in the cotton field is 4.0-18.5; While 0.5 cm is 6.5-11.2 and 20-30 cm is 4.5-18.2, in clover crops this indicator is 35.0; Increased to 24.7 and 27.0. In addition, it revealed the accumulation of more organic and mineral substances under alfalfa cultivation. They proved this by the analysis of soil samples taken from the one year and two-year plots. It was found that 1.66% humus and 0.112% total nitrogen were accumulated in the topsoil of the annual alfalfa field, while the amount of humus accumulated in the topsoil in the biennial clover field was 1.70% and the total nitrogen content was 0.150%. It should be noted. That the development of irrigation erosion in irrigated arable lands depends on the fact that the surface of the area is covered with a large cover. This was clearly shown by the observations. It was found that both relatively weak (0.4 mm / min) and very (1.4 mm / min) heavy rains protect clover soil from further washing. Thus, 0.4 mm / min. In heavy rains, the depth of the furrow under alfalfa is 14.4 mm, 31 mm at 1.4 mm / min, 50.9 and 64.2 mm between rows of cotton, respectively, and 78.6 and 113 mm along the row. 6 mm.

Efficiency of Application of Integrated Measures To Combat Erosion With The Use of Irrigation Systems In Azerbaijan

Studies in the article have shown that productivity increases with improved structure. This is explained by the fact that in soils with 0.25 mm diameter water-resistant aggregates of 14%, grain yield is 22.2 cents / ha, while water-resistant aggregates are 8%. In soils, this figure decreased to 18.4 cents / ha (3.8 cents / ha). It is also known that alfalfa plays a key role in improving the water-physical properties of the soil, as well as its agrochemical composition. The author's research shows that the amount of water-resistant aggregates under the clover is much higher than in the cotton fields. This can be clearly seen from the following comparison. Thus, the amount of water-resistant aggregates in 0-10 cm of soil in the cotton field is 4.0-18.5; While 0.5 cm is 6.5-11.2 and 20-30 cm is 4.5-18.2, in clover crops this indicator is 35.0; Increased to 24.7 and 27.0. In addition, it revealed the accumulation of more organic and mineral substances under alfalfa cultivation. They proved this by the analysis of soil samples taken from the one year and two-year plots. It was found that 1.66% humus and 0.112% total nitrogen were accumulated in the topsoil of the annual alfalfa field, while the amount of humus accumulated in the topsoil in the biennial clover field was 1.70% and the total nitrogen content was 0.150%. It should be noted. that the development of irrigation erosion in irrigated arable lands depends on the fact that the surface of the area is covered with a large cover. This was clearly shown by the observations. It was found that both relatively weak (0.4 mm / min) and very (1.4 mm / min) heavy rains protect clover soil from further washing. Thus, 0.4 mm / min. In heavy rains, the depth of the furrow under alfalfa is 14.4 mm, 31 mm at 1.4 mm / min, 50.9 and 64.2 mm between rows of cotton, respectively, and 78.6 and 113 mm along the row. 6 mm.

EFFECTIVENESS OF THE APPLICATION OF COMPLEX MEASURES TO COMBAT IRRIGATION EROSION IN AZERBAIJAN IN A MARKET ECONOMY (ON THE EXAMPLE OF THE KUR-ARAZ LOW LAND)

The research in the article proves that the improvement of the structure increases the productivity. This is explained by the fact that in soils with 0.25 mm diameter water-resistant aggregates 14%, grain yield is 22.2 cents / ha, while water-resistant aggregates are 8%. In soils, this figure decreased to 18.4 cents / ha (3.8 cents / ha). It is also known that alfalfa plays a key role in improving the water-physical properties of the soil, as well as its agrochemical composition. The author's research shows that the amount of water-resistant aggregates under the clover is much higher than in the cotton fields. This can be clearly seen from the following comparison. Thus, the amount of water-resistant aggregates in 0-10 cm of soil in the cotton field is 4.0-18.5; While 0.5 cm is 6.5-11.2 and 20-30 cm is 4.5-18.2, in clover plantations this indicator is 35.0; Increased to 24.7 and 27.0. In addition, the accumulation of more organic and mineral substances under alfalfa cultivation was revealed. This was confirmed by the analysis of soil samples taken from the one-year and two-year plots. It was found that 1.66% of humus and 0.112% of total nitrogen were accumulated in the topsoil of the annual alfalfa field, while the amount of humus accumulated in the topsoil of the biennial alfalfa was 1.70% and the total nitrogen content was 0.150%. that the development of irrigation ero-sion in irrigated arable lands depends on the fact that the surface of the area is covered with a large cover. This was clearly shown by the observations. It was found that both relatively weak (0.4 mm / min) and very (1.4 mm / min) heavy rains protect clover soil from further washing. Thus, 0.4 mm / min. In intensive rains, the depth of the furrow under the clover is 14.4 mm, 31 mm at 1.4 mm / min, 50.9 and 64.2 mm between rows of cotton, respectively, and 78.6 and 113 mm along the row. 6 mm