scholarly journals Calculation and Analysis of Effective Utilization Coefficients of Farmland Irrigation Water in Guizhou Province

2021 ◽  
Vol 233 ◽  
pp. 01060
Author(s):  
Haikuan Wu ◽  
Meiyun An ◽  
Changjun Cai
Keyword(s):  
Irrigation Water ◽  
Water Distribution ◽  
Water Saving ◽  
Guizhou Province ◽  
Irrigation Planning ◽  
Internal Factors ◽  
Effective Utilization ◽  
Factors Influencing ◽  
Important Index ◽  
Utilization Coefficient

Effective utilization coefficient of farmland irrigation water is an important index for water-saving level evaluation. Tracked calculation of effective utilization coefficients of farmland irrigation water as well as quantitative and qualitative analyses in terms of its scientificity and rationality have a guiding role in sustainable development of water-saving irrigation. This paper sets out to calculate the effective utilization coefficients of farmland irrigation water in Guizhou Province in 2019 and evaluate rationality of the results. More than that, some internal factors influencing utilization coefficients are also investigated, and relevant proposals are put forward, in a view to providing technical support for water-saving irrigation planning and scientific water distribution.

scholarly journals Research on Irrigation Water Efficiency of Guizhou Province Based on SFA

2021 ◽  
Author(s):  
Kang Zhang ◽  
Yunduo Zhang ◽  
Jiangli Zheng ◽  
Zhipeng Ma
Keyword(s):  
Technical Efficiency ◽  
Irrigation Water ◽  
Water Saving ◽  
Guizhou Province ◽  
Water Efficiency ◽  
Effective Utilization ◽  
Utilization Coefficient ◽  
The Difference ◽  
Large Water ◽  
New Perspective

The measurement of farmland irrigation water efficiency is an important part of the evaluation of agricultural water saving. Since the method of econometrics research on the relationship between input and output was introduced to the evaluation of irrigation water efficiency, it has provided a new perspective for evaluating irrigation water efficiency. This study takes Guizhou in southwest China as an example, using the SFA method to calculate the technical efficiency of food production and irrigation water from 2011 to 2018, and compares the technical efficiency of irrigation water with the measured irrigation water effective utilization coefficient analysis. The analysis shows that: (1) Guizhou’s multi-year average irrigation water technical efficiency value is 0.730, and the difference between cities is large. 20.8% of the urban irrigation water technical efficiency is lower than the average level, and there is a large water saving potential; (2) The correlation coefficient between the irrigation water technical efficiency calculated by the SFA method and the measured irrigation water effective utilization coefficient is 0.804, which is highly positively correlated, and the simulation calculation validity is 70.6%; (3) The SFA method can provide an effective reference for the study of the change trend of the effective utilization coefficient of farmland irrigation water in the absence of measured data.

scholarly journals Analysis of Factors Influencing Effective Utilization Coefficient of Irrigation Water in the Manas River Basin

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 189
Author(s):  
Lili Yang ◽  
Tong Heng ◽  
Guang Yang ◽  
Xinchen Gu ◽  
Jiaxin Wang ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Large Scale ◽  
Grey Model ◽  
Analytic Hierarchy ◽  
Effective Utilization ◽  
Factors Affecting ◽  
Factors Influencing ◽  
Utilization Coefficient ◽  
Using Data ◽  
Effective Use

The factors influencing the effective utilization coefficient of irrigation water are not understood well. It is usually considered that this coefficient is lower in areas with large-scale irrigation. With this background, we analyzed the effective utilization coefficient of irrigation water using the analytic hierarchy process using data from 2014 to 2019 in Shihezi City, Xinjiang. The weights of the influencing factors on the effective utilization coefficient of irrigation water in different irrigation areas were analyzed. Predictions of the coefficient’s values for different years were made by understanding the trends based on the grey model. The results show that the scale of the irrigation area is not the only factor determining the effective utilization coefficient of irrigation water. Irrigation technology, organizational integrity, crop types, water price management, local economic level, and channel seepage prevention are the most critical factors affecting the effective use of irrigation water. The grey model prediction results show that the effective utilization coefficient of farmland irrigation water will continuously increase and reach 0.7204 in 2029. This research can serve as a reference for government authorities to make scientific decisions on water-saving projects in irrigation districts in terms of management, operation, and investment.

Analysis on the influencing factors of effective utilization coefficient of irrigation water in irrigation districts based on Horton fractal theory

2019 ◽  
Vol 19 (6) ◽  
pp. 1695-1703
Author(s):  
Dong Liu ◽  
Dandan Guo ◽  
Qiang Fu ◽  
Mo Li ◽  
Chunlei Liu ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Fractal Theory ◽  
Fractal Dimensions ◽  
System Structure ◽  
Irrigation District ◽  
Gray Relational Analysis ◽  
Effective Utilization ◽  
Irrigation Districts ◽  
Utilization Coefficient ◽  
The Relationship

Abstract To study the relationship between the effective utilization coefficient of irrigation water and canal system structure including the influences of various factors in irrigation districts, the fractal dimensions of each irrigation district by Horton's law were calculated by using canal data from 20 typical irrigation districts in Heilongjiang Province. The results showed that the fractal dimensions of the three-level irrigation districts were within the general range of the Horton water law. Of the four-level irrigation districts, only the fractal dimension of the Wutong River irrigation district was 3.037, which was beyond the upper limit of approximately 1.23%. Using gray relational analysis, the correlation degrees of four factors such as the effective irrigated area, the water-saving area ratio, the complexity of the canal structure, the channel density with the effective utilization coefficient of irrigation water and the fractal dimensions were all above 0.5 in the three- and four-level irrigation districts.

scholarly journals Kajian Kebutuhan Air Irigasi Pada Daerah Irigasi Tawangsari, Kabupaten Jombang

2019 ◽  
Vol 2 (1) ◽  
pp. 29
Author(s):  
Safira Ramadhani ◽  
Anna Rosytha ◽  
Miftachul Huda
Keyword(s):  
Irrigation Water ◽  
Water Distribution ◽  
Water Discharge ◽  
Water Layer ◽  
Irrigation Planning ◽  
Water Requirements ◽  
Irrigation Area ◽  
Available Water ◽  
Rotation System ◽  
Agricultural Areas

Water is very important for the survival of living things in this world. Therefore there needs to be a balance between the needs and availability of water, including the need for water in agricultural areas. Water requirements in agricultural areas such as Tawangsari irrigation areas, especially paddy fields, are influenced by several factors, namely; Evapotranspiration, layer replacement, and effective rainfall. The availability of Tawangsari irrigation water from the very limited Tawangsari Dam is a major problem in the Tawangsari irrigation area. From the above problems, it is necessary to study the efficiency of water requirements in the irrigation area by analyzing effective rain, irrigation water needs and the availability of irrigation water. The analysis referred to the Irrigation Planning Criteria 01. From the results of the analysis it could be concluded that the water discharge was very sufficient and could be used to irrigate new land, while the calculation of the amount of water needs was greater than the water available in the dry season. Then from that another alternative was needed, namely by a water distribution rotation system and replacement of the water layer according to the available water so that the available water discharge could be sufficient for the needs.

scholarly journals Afforestation of Degraded Croplands as a Water-Saving Option in Irrigated Region of the Aral Sea Basin

Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1433
Author(s):  
Navneet Kumar ◽  
Asia Khamzina ◽  
Patrick Knöfel ◽  
John P. A. Lamers ◽  
Bernhard Tischbein
Keyword(s):  
Land Use ◽  
Water Balance ◽  
Water Supply ◽  
Water Availability ◽  
Irrigation Water ◽  
Water Saving ◽  
Aral Sea ◽  
Water Balance Components ◽  
Study Region ◽  
Trade Offs

Climate change is likely to decrease surface water availability in Central Asia, thereby necessitating land use adaptations in irrigated regions. The introduction of trees to marginally productive croplands with shallow groundwater was suggested for irrigation water-saving and improving the land’s productivity. Considering the possible trade-offs with water availability in large-scale afforestation, our study predicted the impacts on water balance components in the lower reaches of the Amudarya River to facilitate afforestation planning using the Soil and Water Assessment Tool (SWAT). The land-use scenarios used for modeling analysis considered the afforestation of 62% and 100% of marginally productive croplands under average and low irrigation water supply identified from historical land-use maps. The results indicate a dramatic decrease in the examined water balance components in all afforestation scenarios based largely on the reduced irrigation demand of trees compared to the main crops. Specifically, replacing current crops (mostly cotton) with trees on all marginal land (approximately 663 km2) in the study region with an average water availability would save 1037 mln m3 of gross irrigation input within the study region and lower the annual drainage discharge by 504 mln m3. These effects have a considerable potential to support irrigation water management and enhance drainage functions in adapting to future water supply limitations.

Regional allocation of irrigation water in a rice paddy area with water-saving practices

2011 ◽  
Vol 25 (2) ◽  
pp. 81-96 ◽  
Author(s):  
Shigeya Maeda ◽  
Tatsuya Nagamochi ◽  
Toshihiko Kawachi ◽  
Junichiro Takeuchi
Keyword(s):  
Irrigation Water ◽  
Rice Paddy ◽  
Water Saving ◽  
Paddy Area ◽  
Regional Allocation
Sign in / Sign up

Export Citation Format

Share Document