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| Indicators | Explanation | Classification | Correlation coefficient with irrigation water use efficiency |
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| Annual precipitation (AP) | The total rainfall in a year; millimetre (mm) | Climatic condition | 0.36 |
| Average temperature per year (AT) | Average temperature according to daily temperature in a year; °C | Climatic condition | 0.075 |
| Rainfall frequency (RF) | Accumulated frequency of rainfall of one year | Climatic condition | −0.16 |
| Drought index (DI) | Dividing total evaporation by precipitation in a year | Climatic condition | −0.337 |
| Proportion of farmers (PR) | Proportion of farmers in total employment | Human resources | 0.482 |
| Arable land area (AA) | Agricultural land, reclaimed tideland and river filed; (103 ha) | Resource endowment | −0.521 |
| Per capita arable land (PA) | Dividing arable land by total population in China | Resource endowment | 0.46 |
| Local water resource amount (LW) | The amount of local surface water resources and groundwater resources quantity; (108 m3) | Resource endowment | 0.457 |
| Per capita water resource amount (PW) | Local water resource amount/population | Resource endowment | 0.526 |
| Per capita water consumption (PWC) | Total water consumption in a year/population | Resource endowment | −0.4 |
| Per capita income of farmers (PIF) | Yuan/year | Economic condition | −0.5 |
| Per capita GDP (PGDP) | Yuan/year | Economic condition | −0.5 |
| First industrial output (FIO) | Agricultural output proportion accounted for the total industrial output | Economic condition | 0.535 |
| Rice planting area proportion (RPA) | Rice planting area proportion in the total sown area | Economic condition | 0.1 |
| Grain crop area proportion (GCA) | Grain crop area proportion in the total sown area | Economic condition | 0.1 |
| Crop production (CP) | 104 ton (104 t) | Economic condition | −0.3 |
| Spending on science and technology (SST) | Science and technology spending proportion accounted for the financial expenditure | Technology condition | −0.4 |
| Water-saving irrigation area (WSIA) | 103 Hectare (103 ha) | Technology condition | −0.6 |
| Highly efficient water-saving irrigation area (HWSIA) | 103 Hectare (103 ha) | Technology condition | −0.5 |
| Effective irrigation area (EIA) | Land area truly irrigated; 103 Hectare (103 ha) | Technology condition | −0.5 |
| Spending on agriculture (SA) | Spending proportion on agriculture | Management indices | −0.3 |
| Water price (WP) | Yuan | Management indices | −0.5 |
| Irrigation water use coefficient (IWUC) | Dividing water consumption in farmland by water use for irrigation in a year | Research object (dependent variable) in this paper’s study | 1 |
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