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Identification method of driving factors of farmland irrigation water consumption that can measure the contribution of inflow and dryness

A technology of farmland irrigation and identification method, which is applied in the field of identification of driving factors of farmland irrigation water quantity, and can solve the problems such as the inability to fully and quantitatively explain the change of irrigation water consumption, and the inability to measure the contribution value of the change in the abundance and dryness of incoming water.

Active Publication Date: 2020-04-21
NANJING HYDRAULIC RES INST
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Problems solved by technology

However, the identification of existing driving factors cannot measure the contribution value of the change of inflow and drought, and cannot fully and quantitatively explain the change of irrigation water consumption, and reveal the driving mechanism of irrigation water

Method used

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  • Identification method of driving factors of farmland irrigation water consumption that can measure the contribution of inflow and dryness
  • Identification method of driving factors of farmland irrigation water consumption that can measure the contribution of inflow and dryness
  • Identification method of driving factors of farmland irrigation water consumption that can measure the contribution of inflow and dryness

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Embodiment Construction

[0019] In order to better understand the present invention, the specific implementation of the technical solution of the present invention will be described in detail below by taking Shandong Province as an example, but the present invention is not limited thereto.

[0020] The identification method of driving factors of farmland irrigation water consumption in Shandong Province, the steps include:

[0021] (1) Collect the actual irrigated area IRR in three typical years of 2002, 2007 and 2012 from the Shandong Provincial Water Resources Bulletin and the Shandong Provincial Statistical Yearbook t (t=2002,2007,2012), effective irrigated area IRA t , Farmland irrigation water consumption WA t , Effective utilization coefficient of irrigation water η t Data, as shown in Table 1.

[0022] Table 1 Water consumption for farmland irrigation in Shandong Province in 2002, 2007 and 2012

[0023] index 2002 2007 2012 Effective irrigated area (thousand hectares) 4797...

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Abstract

The invention discloses a farmland irrigation water capacity driving factor identification method capable of calculating incoming water high-flow and low-flow contributions. The method comprises the steps that actual irrigation areas, effective irrigation areas, farmland irrigation water capacity and irrigation water effective utilization coefficient data in different years are collected; an irrigation water capacity identical equation is constructed considering the irrigation areas, irrigation water utilization efficiency and the incoming water high-flow and low-flow change contributions; a farmland irrigation water capacity change is disintegrated into four driving factors, namely an effective irrigation scale, an actual irrigation proportion, an irrigation water effective utilization coefficient and average net irrigation water capacity per mu, wherein the actual irrigation proportion and the average net irrigation water capacity per mu mainly reflect incoming water high-flow and low-flow change influences; an LMDI method is utilized to derive a driving factor contribution value calculation formula, driving factor contributions and the incoming water high-flow and low-flow change contributions are calculated quantitatively, and farmland irrigation water capacity changes are interpreted without residual errors; and key driving factors are identified through the contribution values, and a driving mechanism is disclosed.

Description

technical field [0001] The invention relates to a method for identifying driving factors of farmland irrigation water volume that can measure and calculate the contribution of inflow and outflow. Background technique [0002] At present, the total amount of water used for farmland irrigation in my country is large and the efficiency is low, which is still in a growth trend, which is one of the important reasons for the prominent contradiction between supply and demand of water resources. Identifying the driving factors that affect the change of irrigation water consumption and revealing the driving mechanism is of great importance for grasping the change trend of irrigation water consumption, formulating farmland irrigation water management policies, improving the efficiency and benefit of irrigation water consumption, restraining the growth of irrigation water consumption, and alleviating the contradiction between supply and demand of water resources. significance. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/02
CPCG06Q50/02
Inventor 程亮王宗志刘克琳彭安邦蒋尚明赵百营胡霞
Owner NANJING HYDRAULIC RES INST
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