Result of subsoil irrigation research of alfalfa grown for green feed in Volgo-Akhtubinskaya flood plant

Relevance of subsoil irrigation usage for growing feed crops on alluvial meadow soils is shown. Distribution of pjezometric pressure, along the water emitter line during the irrigating period, is analyzed. Formation of moisture patterns in the soil regarding the quantities of irrigating water and emitters design are considered. In order to define the characteristics of moisture patterns in the soil, depending on the quantities of irrigating water, the ratios of vertical water spreading Kv and forms Kf are calculated. Expediency of usage low irrigating rates is substantiated. As a result of research, mathematical relations were derived in order to define water outlays in the emitters made of pottery tubes with diameter 50 mm under water pressure at the line 0.1?0.7 m. It is determined that usage of subsoil irrigation allows increase of commercial crop harvest, significantly save water resources, labour and energy comparing to sprinkling.

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THE ECONOMY OF WATER RESOURCES WITH THE USE OF POLYMER COMPLEXES IN IRRIGATION OF A COTTON

Irrigatsiya va Melioratsiya ◽

10.35938/2018.1.12.2 ◽

2018 ◽

pp. 8-12

Author(s):

M. Khamidov ◽

B. Suvanov ◽

K. Khamroev

Keyword(s):

Water Resources ◽

Moisture Capacity ◽

Polymer Complexes ◽

Maturation Phase ◽

Flowering Phase ◽

Fruit Cultivation ◽

Growth Development ◽

Control Variant ◽

Maximum Field ◽

Alluvial Meadow

The article deals with the use of polymer complexes in alluvial-meadow soils under the pre-determined humidity of 70-80-65% of the maximum field moisture capacity, in the second option with the 1-2-1 scheme in the Bukhara oasis. During the seedling and flowering phase, one irrigation irrigation norm was performed at 734 m3/ha; during the blooming and fruit cultivation phase, three irrigation operations were performed with irrigation norms of 631-644 m3/ha, one irrigation with a watering rate of 865 m3/ha was performed during the maturation phase. The irrigation norm was 2874 m3/ha or, relative to the control variant, by 1754 m3/ha less, which allowed saving manual water, as well as the results of the conducted experiments and their impact on cotton growth, development and yield.

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Can Water Rights Trading Scheme Promote Regional Water Conservation in China? Evidence from a Time-Varying DID Analysis

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17186679 ◽

2020 ◽

Vol 17 (18) ◽

pp. 6679 ◽

Cited By ~ 1

Author(s):

Lin Fang ◽

Fengping Wu

Keyword(s):

Water Resources ◽

Water Use ◽

Water Consumption ◽

Water Conservation ◽

Water Pressure ◽

Water Rights ◽

Policy Implications ◽

Time Varying ◽

Trading Scheme ◽

Regional Water

Using the panel data of 30 provinces in China from 1998 to 2017, we adopt a time-varying difference-in-differences (time-varying DID) model to estimate the impact of water rights trading scheme on regional water consumption. The results show that water rights trading can significantly promote water conservation in the pilot regions by 3.1% compared to that in the non-pilot regions, and a series of robustness tests show consistent results. Policy effects are mainly driven by improving water-use efficiency and adjusting water structure; that is, by transferring water resources from the agricultural sector to the other sectors, agricultural water efficiency is improved and water conflict among sectors is alleviated; thus, water saving is achieved. In addition, by constructing two indexes of regional water pressure and tradable water resources, our heterogeneity analysis shows that water rights trading performs better in areas with high water pressure and large tradable water resources. Under the high pressure of large water use and low water endowment, water rights trading will evidently reduce water consumption more so than in the low-pressure regions, and with water rights trading, it is hard to achieve a policy effect in regions without sufficient tradable water resources. This paper provides important policy implications for China for further promoting the water rights trading scheme in the field of resource conservation.

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An inexact stochastic optimization model for multi-conflict regional water resources allocation in the south-to-north water benefited area

Journal of Hydroinformatics ◽

10.2166/hydro.2018.121 ◽

2018 ◽

Vol 20 (4) ◽

pp. 946-959 ◽

Cited By ~ 3

Author(s):

Fu Zhenghui ◽

Wang Yuqi ◽

Lu Wentao ◽

Zhao Haojin ◽

Liu Jiaju ◽

...

Keyword(s):

Water Resources ◽

Optimization Model ◽

Large Scale ◽

Optimal Allocation ◽

Water Pressure ◽

Water Sources ◽

Water Diversion ◽

Two Stage ◽

Water Diversion Project ◽

Regional Water

Abstract The cross-regional water diversion project has been widely applied as an important way to relieve water pressure. Study about the tradeoff between multiple regions and multiple water use sectors has caused widespread concern. In this study, an inexact two-stage water resources management model for multi-region water resources planning with a large-scale water diversion project has been developed. The water sources in 11 districts, including independent water sources and public water sources diverted from the project, are considered in the optimization model. Water supply cost and recourse cost are analyzed in the objective function. Based on interval-parameter programming and two-stage stochastic programming, uncertainties in the water resources system are described by both interval values and probability distributions. The result indicates that the water diversion project would greatly change the composition of the water resource system and settle the uneven distribution of regional water resources to achieve district-optimal allocation of water resources. In general, the proposed method can help decision-makers to formulate water management strategies for rational utilization of all kinds of water resources in different regions.

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Optimizing the Use of Hidram Pump to Supply Water Needs In Nagari Barulak Tanah Datar

Jurnal Aplikasi IPTEK Indonesia ◽

10.24036/4.34353 ◽

2020 ◽

Vol 4 (3) ◽

pp. 217-226

Author(s):

Hendri Nurdin ◽

Waskito Waskito ◽

Hasanuddin Hasanuddin ◽

Delima Yanti Sari

Keyword(s):

Water Resources ◽

Water Supply ◽

Everyday Life ◽

Water Pressure ◽

Science And Technology ◽

Public Funding ◽

Appropriate Technology ◽

Clean Water ◽

Human Beings ◽

Living Things

Water is one of the financial needs for life. In everyday life we can see the importance of water for all living things, as well as human beings who also need water very much. In Jorong Dalam Nagari Barulak Tanah Datar, the need for clean water is difficult to obtain. This is because the position of this area is in the highlands. During the summer in the highlands it is very difficult to find a source of clean water, so that to meet these water needs, people get it by buying. The solution to overcome this problem is to apply science and technology in the form of a hydram pump that utilizes water pressure from a reservoir from a spring. Then the water is pumped through a pipeline to the divider tank at an elevated area. Clean water supply using a hydram pump is able to distribute water by 18.43 liters/min. So that the performance of a hydram pump continuously (within 24 hours) can supply of water as much as 26.54 m3/day. Applying appropriate technology in the form of a hydram pump as an effort to optimize the supply of clean water from the lowlands to the highlands so that it can address the water needs in the Nagari Barulak community. Utilizing the potential of existing water resources has an impact on increasing activities and reducing public funding for buying clean water.

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The growth of mica polytypes as studied by conventional and high-resolution TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100074690 ◽

1983 ◽

Vol 41 ◽

pp. 174-177

Author(s):

A. Baronnet ◽

M. Amouric

Keyword(s):

Water Pressure ◽

Point Of View ◽

Temperature Fields ◽

Natural Occurrence ◽

Growth Mechanisms ◽

Long Period ◽

High Resolution Tem ◽

Layer Stacking ◽

Experimental Works ◽

Potential Use

The origin of mica polytypes has long been a challenging problem for crystal- lographers, mineralogists and petrologists. From the petrological point of view, interest in this field arose from the potential use of layer stacking data to furnish further informations about equilibrium and/or kinetic conditions prevailing during the crystallization of the widespread mica-bearing rocks. From the compilation of previous experimental works dealing with the occurrence domains of the various mica "polymorphs" (1Mr, 1M, 2M1, 2M2 and 3T) within water-pressure vs temperature fields, it became clear that most of these modifications should be considered as metastable for a fixed mica species. Furthermore, the natural occurrence of long-period (or complex) polytypes could not be accounted for by phase considerations. This highlighted the need of a more detailed kinetic approach of the problem and, in particular, of the role growth mechanisms of basal faces could play in this crystallographic phenomenon.

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