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Revision Methods for Guangxi Agricultural Irrigation Water Quota
SU Dong-yuan, HE Ling-zu, MO Ming-zhu, LIU Zong-qiang
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Revision Methods for Guangxi Agricultural Irrigation Water Quota
In order to improve the rationality and practicality of agricultural irrigation water quotas, based on the limitations of the current quotas (Guangxi 2019 version) , combined with the latest national quotas and relevant regulations，the Guangxi agricultural irrigation water quotas revision has been carried out. The natural conditions, water use conditions, engineering facilities and field measures have been considered to construct the water quotas framework. In the revision, 20 new crop types were added, the quotas zoning was partially adjusted, also, a 75% hydrological year type was appended, and the statistical interface position of water quotas was modified. Through studying the long-term irrigation water use patterns of crops at various irrigation stations and the effective utilization coefficient of irrigation water data, as well as the water use per unit irrigated area in each region, the proportional coefficient of irrigation water quotas for different hydrological years and different regions was proposed. Effective utilization coefficients of irrigation water below designated locations in different zones were proposed. Based on this, advanced and standard values for agricultural irrigation water quotas for 60 major crops were formulated. At the same time, the conversion of the quotas between the specified location and the head of the canal and the field was established, which provides a method for calculating quotas in areas with incomplete measurement and lack of data. The revised water quotas were improved in terms of coverage, rationality, practicality, and progressiveness. Recommendations for further improving the methods for revising water quotas are also provided.
agriculture / quota of irrigation water / revise method / Guangxi {{custom_keyword}} /
Tab.1 Framework table of water quota indicators表1 用水定额指标框架表 |
| 项目 | 影响因素 | 框架指标 | 指标内容 |
|---|---|---|---|
| 自然条件 | 气候 | 水文年 | 50%、75%、85% |
| 地形地貌、土壤类型、水资源条件 | 定额分区 | Ⅰ区、Ⅱ区、Ⅲ区、Ⅳ区、Ⅴ区 | |
| 用水条件 | 用水水平及习惯、作物用水特点 及分布 | 定额分区 | Ⅰ区、Ⅱ区、Ⅲ区、Ⅳ区、Ⅴ区 |
| 工程条件 | 灌区规模、水源类型、输水工程状况 | 定额分级 | 先进值、通用值 |
| 输水方式 | 输水方式 | 渠道输水灌溉、管道输水灌溉 | |
| 田间措施 | 灌溉方式 | 田间灌溉方式 | 格田灌溉、淹灌、沟灌、管道淋灌、喷灌、微灌、微喷灌、滴灌、涌泉灌 |
| 农艺措施 | 栽培方式 | 露地、设施、避雨棚、露地横种、露地竖种 |
Tab.2 Quota partition and characteristic table表2 定额分区及特性表 |
| 分区 | 区域 分布 | 市 | 气候-降雨/ mm | 水资源条件 | 地形地貌 | 土壤类型 | 作物结构 |
|---|---|---|---|---|---|---|---|
| Ⅰ区 | 桂东 | 梧州市、玉林市、贺州市 | 1 530~1 693 | 水资源丰富 | 微丘陵和河流冲积 平原为主 | 水稻土、红壤 | 水稻、蔬菜、柚子、柑橘、油料、木薯 |
| Ⅱ区 | 桂西 | 河池市、百色市（其他县） | 1 300~1 473 | 水资源相对紧缺且开发程度较低，石山岩溶区渗漏较大 | 丘陵山地为主，岩溶 地质发育 | 水稻土、石灰岩土 | 水稻、玉米、甘蔗、蔬菜、烟叶 |
| Ⅲ区 | 桂中 | 南宁市、贵港市、崇左市 （其他县） | 1 299~1 542 | 水资源丰富 | 河流冲积平原和大型盆地为主 | 水稻土、红壤 | 水稻、玉米、甘蔗、蔬菜、油料、柑橘、火龙果 |
| Ⅳ区 | 桂南 | 北海市、钦州市、防城港市 | 1 656~2 239 | 水资源丰富 | 微丘陵和小型平原 为主 | 水稻土、赤红壤和滨海盐，土壤疏松，含沙量较大 | 水稻、甘蔗、蔬菜、木薯、油料 |
| Ⅴ区 | 桂中 桂北 桂西 | ①柳州市、桂林市、来宾市；②百色市（右江区、乐业县、田林县）、崇左市（扶绥县、宁明县） | ①1 675~1 786 ②1 051~1 252 | 水资源丰富，石山岩溶区渗漏较大；降水低区 | 丘陵和小台地为主，右江河谷百色地区以山间河谷平原为主 | 水稻土、红壤 | 水稻、甘蔗、蔬菜、柑橘、芒果、葡萄、柿子 |
Tab.3 Tabe of net irrigation water quota proportionality coefficients for different zones表3 不同分区净灌溉用水定额比例系数表 |
| 分区 | ①综合平均净灌溉定额比例系数计算 | ②双季水稻净灌溉定额比例系数计算 | 比例系数值确定 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 耕地灌溉 水量/ 亿m³ | 主要作物 灌溉面积/ km2 | 灌溉水有效利用系数 | 耕地净灌溉水量/ 亿m³ | 净灌溉定额/(m³·hm-2) | 综合平均净灌溉定额 比例系数 | 平均净灌溉定额/ (m³·hm-2) | 平均净灌溉定额比例 系数 | ①、② 平均值 | 调整后 取值 | |
| Ⅰ区 | 35.01 | 7 794 | 0.515 | 18.01 | 2 310 | 0.95 | 5 910 | 0.81 | 0.88 | 0.90 |
| Ⅱ区 | 22.6 | 4 781 | 0.514 | 11.62 | 2 430 | 1.00 | 7 305 | 1.00 | 1.00 | 1.00 |
| Ⅲ区 | 47.59 | 10 794 | 0.520 | 24.74 | 2 295 | 0.94 | 7 110 | 0.97 | 0.96 | 0.96 |
| Ⅳ区 | 18.81 | 4 067 | 0.516 | 9.71 | 2 385 | 0.98 | 7 710 | 1.06 | 1.02 | 1.02 |
| Ⅴ区 | 47.91 | 9 330 | 0.536 | 25.68 | 2 760 | 1.13 | 8 445 | 1.16 | 1.14 | 1.11 |
| 平均 | 171.92 | 36 766 | 0.521 | 89.57 | 2 430 | 1.00 | 7 290 | 1.00 | 1.00 | 1.00 |
Tab.4 Reference range table for proportion coefficient of net irrigation water quota for different hydrological year表4 不同水文年型净灌溉用水定额比例系数参考范围表 |
| 水文年 | 双季稻 | 水田、蔬菜（露地） | 果树、 旱作物 （露地） | 蔬菜、 旱作物 （设施） | |
|---|---|---|---|---|---|
| 净灌溉 定额/ (m³·hm-2) | 比例 系数 | ||||
| 丰水年 （P=25%） | 5 800 | 1.00 | 1.00 | 1.00 | 1.00 |
| 平水年 （P=50%） | 7 366 | 1.27 | 1.20~1.40 | 1.20~1.40 | 1.20 |
| 枯水年 （P=75%） | 9 106 | 1.57 | 1.50~1.70 | 1.50~1.60 | 1.40 |
| 较枯水年 （P=85%） | 1.70~1.85 | 1.60~1.70 | 1.50 | ||
Tab.5 The current year effective utilization coefficient of irrigation water below the designated location in different zones表5 不同分区规定位置以下基准年灌溉水有效利用系数 |
| 输水方式 | 分区 | 平均值 | ||||
|---|---|---|---|---|---|---|
| Ⅰ区 | Ⅱ区 | Ⅲ区 | Ⅳ区 | Ⅴ区 | ||
| 渠道输水 | 0.514 | 0.514 | 0.519 | 0.516 | 0.543 | 0.522 |
Tab.6 Effective utilization coefficient of water-saving irrigation water for different water delivery methods and field irrigation methods表6 不同输水方式、田间灌溉方式的节水灌溉水有效利用系数 |
| 输水方式 | 渠道防渗输水 | 管道输水 | ||||
|---|---|---|---|---|---|---|
| 田间灌溉 方式 | 地面 灌溉 | 地面 灌溉 | 管道 淋灌 | 喷灌 | 涌泉灌 | 微灌（微喷灌、滴灌） |
| 灌溉水有效利用系数 | 0.70 | 0.80 | 0.80 | 0.80 | 0.80 | 0.85 |
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PDF(1043 KB)
Tab.1 Framework table of water quota indicatorsTab.2 Quota partition and characteristic table
Fig.1 Guangxi agricultural irrigation water quota zoneTab.3 Tabe of net irrigation water quota proportionality coefficients for different zonesTab.4 Reference range table for proportion coefficient of net irrigation water quota for different hydrological yearTab.5 The current year effective utilization coefficient of irrigation water below the designated location in different zonesTab.6 Effective utilization coefficient of water-saving irrigation water for different water delivery methods and field irrigation methods/
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