Mathematical Models of the Soil Water-Air Regime Regulation Based on Calculating of Water-Salt Flow in the Aeration Zone

2004 ◽  
Vol 31 (6) ◽  
pp. 591-598
Author(s):  
Y. I. Kalugin ◽  
S. N. Kurganskaya ◽  
V. S. Siry
Keyword(s):  
Mathematical Models ◽  
Soil Water ◽  
Aeration Zone ◽  
Water Salt ◽  
Salt Flow

Effect of irrigation with saline water on soil water-salt dynamics and maize yield in Arid Northwest China

2010 ◽  
Vol 15 (1) ◽  
pp. 85-92 ◽  
Author(s):  
Jing Jiang ◽  
Shaoyuan Feng ◽  
Zailin Huo ◽  
Yongsheng Wang ◽  
Zhenhua Sun
Keyword(s):  
Soil Water ◽  
Saline Water ◽  
Maize Yield ◽  
Northwest China ◽  
Water Salt ◽  
Arid Northwest China

WATER AND SALT BALANCES OF KATLABUKH LAKE UNDER DIFFERENT CONDITIONS OF WATER RESERVOIR OPERATION

2019 ◽  
pp. 23-40
Author(s):  
Y.A. Romanova ◽  
Zh.R. Shakirzanova ◽  
E. D. Gopchenko ◽  
I.S. Medvedieva
Keyword(s):  
Water Reservoir ◽  
Feasibility Studies ◽  
Water Levels ◽  
Danube River ◽  
The Danube River ◽  
Management Measures ◽  
Mineralized Water ◽  
Design Values ◽  
Water Salt ◽  
Salt Flow

Katlabukh Lake is a part of the Danube Lakes system and is one of the surface water sources for water supply, for agricultural needs and irrigation of the region. Changing the conditions of operation and regulation of the reservoir led to a decrease of water levels and an increase of salinity, which makes it impossible to use water for different management needs. Calculations of the water and salt regimes of the lake based on the solution of the equation of balance said that in the water balance of Katlabukh Lake the main volume of the revenue part for the period 1980-2018 was precipitation (36.1%) and water inflow from the Danube River (38%), and the expenditure part – evaporation together with transpiration (50.5%). Salt flow into the lake is mainly due to surface inflow (53.4%) and water of the Danube River (25.5%), and loss of irrigation (45.1%) and water discharges to the Danube River (31.9%). Simulation modeling of the water-salt regime of the Katlabukh lake under different conditions of exploitation of the reservoir showed that corrective management measures are needed to improve the qualitative indicators of the water in the reservoir. They consist in the fact that for three summer months it is necessary to carry out forced pumping of poorly mineralized water from the Danube River to compensate for evaporation from the water surface (on average in volumes of the order of 55 million m3) or to carry out fences of water from the lake for irrigation in 60 million m3. This will allow to reach the design values of water mineralization in the lake equal to 1.0-1.5 g/dm3. Thus, addressing a range of problems to conserve and restore the rational use of the natural resources of Katlabukh Lake requires effective managerial water management activities that require additional feasibility studies.

Respond of Plant Growth and Soil Water-Salt to Different Irrigation Amounts in Little Thickness Aeration Zone in the Hinterland of Taklimakan Desert

2013 ◽  
Vol 726-731 ◽  
pp. 3872-3876 ◽  
Author(s):  
Xiao Jun Jin ◽  
Jing Long Fan ◽  
Bo Xu ◽  
Bing Wen Li ◽  
Xin Wen Xu
Keyword(s):  
Plant Growth ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Irrigation Water ◽  
Saline Water ◽  
Taklimakan Desert ◽  
Water Condition ◽  
Sustainable Water Supply ◽  
Water Salt

In order to clarify the influence of saline water irrigation to plant growth and distribution ofsoil water-salt, and providing theoretical basis for sustainable water supply of ecological constructionin desert area, the data of soil water-salt and plant growth was observed at Tarim Desert HighwayShelter-forest Ecological Project No. 17 well. The law of soil water and salt spatial distribution wasanalyzed, and the responses of plant growth to 4 different irrigation amounts were studied by singleelement variance analysis. The results were as follows: the soil water content reaches or is close tosaturation in layer of 100~120cm under the 420mm irrigation water condition; The soil water contentreaches or is close to saturation in layer of 160~180cm under the 233.1mm irrigation water condition;The soil water content reaches or is close to saturation in layer of 180~200cm under the 285.6mm irrigation water condition; The soil water content reaches or is close to saturation in layer of160~180cm under the 201.6mm irrigation water condition. The vertical distribution law of soilssalinity is that the soil salt can enter groundwater after 3 days of irrigation, and be gathered in 0~30cmsoil layer. There were no significant differences except the Tamarix plant height in plant growthindexes among 4 different irrigation quantities treatments.

scholarly journals MODELING OF A WATER-SALT BALANCE OF A RIVER POOL WITH DEVELOPED IRRIGATED AGRICULTURE

2020 ◽  
Vol 1 (5) ◽  
pp. 65-70
Author(s):  
G.Kh. Ismaiylov ◽  
◽  
N.V. Muraschenkova ◽  
Keyword(s):  
Moisture Content ◽  
Groundwater Level ◽  
Irrigated Agriculture ◽  
Salt Balance ◽  
Aeration Zone ◽  
River Bed ◽  
Main River ◽  
Horizontal Flows ◽  
Water Salt ◽  
Water And Salt Balance

The construction of a mathematical model of the water-salt balance for river basins with the predominant development of irrigated agriculture is considered. The structures of the water and salt balance of the irrigated territory and the balance of the main river bed within it are given. It has been established that if the inflow and outflow of water and salts dissolved in it are caused by its horizontal flows, then the evaporation and accumulation of water (salts) in the aeration zone and groundwater are caused by its vertical flows.This leads to the need to consider instead of the general equation of the water (salt) balance of the irrigated territory of its modifications for the distinguished three vertical zones, that is, “the surface of the territory – aeration zone – groundwater zone”. During the operation of the algorithm, the following are successively determined: elements of the water and salt balance of the irrigated territory and the riverbed; groundwater level as a result of the intake of salts with in-person flow of local tributaries; filtration losses from the channels and the lateral residue of the inflow; moisture content in the aeration zone after irrigation water and precipitation enters it; groundwater level after water from the aeration zone; moisture content in the aeration zone after the influx of groundwater into it; the outflow of groundwater into the riverbed and the final mineralization of water in the aeration zone.

scholarly journals Simulation soil water-salt dynamics in saline wasteland of Yongji Irrigation area in Hetao Irrigation district of China

2020 ◽  
Author(s):  
Chengfu Yuan
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Salt Concentration ◽  
Field Experiments ◽  
Soil Layer ◽  
Irrigation District ◽  
Soil Salt ◽  
Water Salt ◽  
Hetao Irrigation District

Abstract In order to explore the regional water-salt balance mechanism in Hetao Irrigation District. Field experiments were conducted in 2018 and 2019 in Heji canal study area. The SWAP model was calibrated and validated based on field experiments observed data. The SWAP model was used to simulate soil water-salt dynamic in saline wasteland after calibration and validation. The results showed that model simulation results of soil water content and soil salt concentration agreed well with the measured values. Soil water content and soil salt concentration changed obviously under the effect of farmland irrigation in crop growing period. Soil salt was accumulated in saline wasteland. The soil salt accumulation of each soil layer in saline wasteland was 0.164, 0.092, −0.890 and −1.261 mg/cm3, respectively. Soil water content gradually increased and soil salt concentration gradually decreased in autumn irrigation period. Soil salt was leached in saline wasteland. The soil salt accumulation of each soil layer in saline wasteland was −1.011, −1.242, −1.218 and −1.335 mg/cm3, respectively. The saline wasteland became in drainage and salt drainage region for cultivated land. The saline wastelands had an obvious role in adjusting salt balance and maintain salt dynamic balance in Hetao Irrigation District.

scholarly journals Effects of Drip Irrigation Volume on Soil Water-salt Transfer and Its Redistribution

2011 ◽  
Vol 28 (1) ◽  
pp. 79-84 ◽  
Author(s):  
Litan Su ◽  
Abudu Shalamu ◽  
Yu-dong SONG
Keyword(s):  
Soil Water ◽  
Drip Irrigation ◽  
Water Salt ◽  
Irrigation Volume

scholarly journals Soil water regime estimated from the soil water storage monitored in time

2008 ◽  
Vol 3 (Special Issue No. 1) ◽  
pp. S139-S146 ◽  
Author(s):  
J. Šútor ◽  
M. Gomboš ◽  
M. Kutílek ◽  
M. Krejča
Keyword(s):  
Ground Water ◽  
Water Level ◽  
Soil Water ◽  
Soil Profile ◽  
Water Regime ◽  
Water Storage ◽  
Ground Water Level ◽  
Soil Water Storage ◽  
Aeration Zone ◽  
Soil Water Regime

During the vegetation season, the water storage in the soil aeration zone is influenced by meteorological phenomena and by the vegetated cover. If the groundwater table is in contact with the soil profile, its contribution to water storage must be considered. This impact can be either monitored directly or the mathematical model of the soil moisture regime can be used to simulate it. We present the results of monitoring soil water content in the aeration zone of the East Slovakian Lowland. The main problem is the evaluation of the soil water storage in seasons and in years in the soil profile. Until now, classification systems of the soil water regime evaluation have been mainly based upon climatological factors and soil morphology where the classification has been realized on the basis of indirect indicators. Here, a new classification system based upon quantified data sets is introduced and applied for the measured data. The system considers the degree of accessibility of soil water to plants, including the excess of soil water related to the duration for those characteristic periods. The time span is hierarchically arranged to differentiate between the dominant water storage periods and short-term fluctuations. The lowest taxonomic units characterize the vertical fluxes over time periods. The system allows the comparison of soil water regime taxons over several years and under different types of vegetative cover, or due to various types of land use. We monitored soil water content on two localities, one with a deep ground water level, one with a shallow ground water level. The profile with a shallow ground water level keeps a more uniform taxons and subtaxons of soil water regime due to the crop variation than the profile with a deep ground water level.

scholarly journals Soil Water-Salt Dynamics and Maize Growth as Affected by Cutting Length of Topsoil Incorporation Straw under Brackish Water Irrigation

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 246
Author(s):  
Zemin Zhang ◽  
Zhanyu Zhang ◽  
Peirong Lu ◽  
Genxiang Feng ◽  
Wei Qi
Keyword(s):  
Soil Moisture ◽  
Soil Properties ◽  
Soil Water ◽  
Brackish Water ◽  
Salt Accumulation ◽  
Summer Maize ◽  
Soil Salt ◽  
Cutting Length ◽  
Water Salt ◽  
Straw Incorporation

Brackish water has been utilized extensively in agriculture around the world to cope with the global water deficit, but soil salt accumulation caused by brackish water irrigation cannot be ignored. Straw incorporation has been confirmed an effective sustainable means to inhibit soil salt accumulation. An experiment was conducted in growth tanks over two consecutive growing seasons to investigate the effects of wheat straw incorporation on soil moisture and salinity under brackish water irrigation (5g NaCl L−1). Furthermore, the trial investigated the effects of three wheat straw cutting lengths (CK = 0 cm; L1 = 5 cm, L2 = 10 cm, and L3 = 20 cm) on soil water-salt dynamics and summer maize growth. The results showed that soil properties and maize yields were favorably and significantly affected by the shorter straw segments incorporated into the cultivated field (p < 0.05), as indicated in the decrease in soil bulk density (7.47%–7.79%) and the rise of soil organic matter (SOM) content (2.4–4.5g kg−1) and soil total porosity (4.34%–4.72%) under treatment L1. Meanwhile, treatment L1 produced the greatest dry above-ground biomass (14447 ± 571 kg ha−1), 100-grain weight (34.52 ± 1.20 g) and grain yield (7251 ± 204 kg ha−1) of summer maize. Soil water content in the cultivated layer increased 4.79%–25.44%, and the soil salt accumulation rate decreased significantly due to the straw incorporation and the highest value of soil moisture content (19.10%–21.84%), as well as the lowest value of soil salt accumulation rates (2.12–9.06) obtained at treatment L1. Straw incorporation with cutting length in 5 cm is the optimal choice for alleviating the adverse effects due to brackish water irrigation and improving soil properties, which could be helpful for agricultural mechanization and straw field-returning practices.

RESPONSES OF SOIL WATER‐SALT VARIATION AND COTTON GROWTH TO DRIP IRRIGATION WITH SALINE WATER IN THE LOW PLAIN NEAR THE BOHAI SEA

2020 ◽  
Vol 69 (3) ◽  
pp. 448-459
Author(s):  
Anqi Zhang ◽  
Chunlian Zheng ◽  
Kejiang Li ◽  
Hongkai Dang ◽  
Caiyun Cao ◽  
...  
Keyword(s):  
Soil Water ◽  
Drip Irrigation ◽  
Bohai Sea ◽  
Saline Water ◽  
The Bohai Sea ◽  
Water Salt

Research progress in soil water/salt dynamics and crop growth under saline water irrigation

2011 ◽  
Vol 19 (4) ◽  
pp. 976-981
Author(s):  
Jing YANG ◽  
Ming-Xin YANG ◽  
Bao-Di DONG ◽  
Yun-Zhou QIAO ◽  
Chang-Hai SHI ◽  
...  
Keyword(s):  
Soil Water ◽  
Saline Water ◽  
Crop Growth ◽  
Research Progress ◽  
Saline Water Irrigation ◽  
Water Salt
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