Analysis of Irrigation Canal System Characteristics in Heilongjiang Province and the Influence on Irrigation Water Use Efficiency

被引：10

作者：

Li, Tianxiao ^{[1
,2
,3
]}

Sun, Mengxin ^{[1
,2
,3
]}

Fu, Qiang ^{[1
,2
,3
]}

Cui, Song ^{[1
,2
,3
]}

Liu, Dong ^{[1
,2
,3
]}

机构：

[1] Northeast Agr Univ, Sch Water Conservancy & Civil Engn, Harbin 150030, Heilongjiang, Peoples R China

[2] Minist Agr China, Key Lab High Efficient Utilizat Agr Water Resourc, Harbin 150030, Heilongjiang, Peoples R China

[3] Northeast Agr Univ, Heilongjiang Prov Key Lab Water Resources & Water, Harbin 150030, Heilongjiang, Peoples R China

来源：

WATER | 2018年 / 10卷 / 08期

基金：

中国国家自然科学基金;

关键词：

irrigation district; canal system complexity; irrigation water use efficiency; Horton's law; RIVER NETWORKS; CHANNEL NETWORKS; STREAM NETWORKS; FEATURES; SERIES; CHINA; LAWS;

D O I：

10.3390/w10081101

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Irrigation water use efficiency is a primary evaluation index that links economic production development with the efficient use of water resources. Canal water conveyance is an important part of irrigation, and the distribution characteristics of canal systems have an important influence on irrigation water use efficiency. In this paper, 75 irrigated districts in Heilongjiang Province in 2015 were selected as the study objects. The main, branch, lateral, and sublateral canals were graded into first-, second-, third-, and fourth-order classes, respectively. The irrigation districts were divided into three classes, that is, four-order, three-order, and two-order, according to the canal orders that the irrigation districts contained. The canal system framework was described by Horton's law. The fractal dimension of the canal system was calculated based on the bifurcation ratio and length ratio of the canals. The relationships between fractal dimensions and irrigation water use efficiency were evaluated. The results showed that the irrigation water use efficiency of the four-order and three-order irrigation districts initially increased and then decreased with increases in the fractal dimension (D). In the irrigation districts, an irrigation water use efficiency of more than 10 x 10(3) hm(2) and less than 0.67 x 10(3) hm(2) was proportional to the increase in the fractal dimension, whereas the opposite result was found for districts with (0.67-10) x 10(3) hm(2). The irrigation water use efficiency of the four-order and two-order irrigation districts with less than 3.3 x 10(3) hm(2) had the greatest potential to increase the water use efficiency. Therefore, canal system reconstruction suggestions for different irrigation districts were provided. The results have important theoretical significance and practical value for the improvement of irrigation construction and the promotion of irrigation water efficiency planning.

引用

页数：15

共 45 条

[1] A HOMOGENEITY TEST APPLIED TO PRECIPITATION DATA [J].