基于博弈论可变集模型的节水型社会建设评价

节水型社会建设评价的研究是制定相关节水政策与措施的基础。在节水型社会建设评价的过程中,既存在清晰信息,也存在模糊信息。根据这一特点,结合陈守煜教授的可变集理论,运用博弈论组合主观与客观权重,提出了一种基于博弈论可变集的节水型社会建设评价模型。利用该模型对洛阳市节水型社会建设情况进行评价,并与模糊综合评价法、模糊物元法、TOPSIS法和VIKOR法的结果相对比。结果表明:洛阳市节水型社会建设呈现一种发展向上的趋势,节水情况越来越好,可变集模型与其他评价方法相比具有更高的准确性与合理性。

Applicability of Tennant method in rivers in southeast coastal areas of Fujian Province

Tennant method is widely used in the calculation of ecological basic flow, but it has limitations. Jiulong River, Jinjiang River, Mulan Stream and Dongxi Stream in southeast coastal areas of Fujian Province were selected as examples to study the applicability of the Tennant method in this area. The results showed that the ecological base flows calculated by the Tennant method were smaller than the minimum monthly average flow of the rivers, indicating that the Tennant method is not suitable for calculating runoff with large annual and inter-annual variations. Taking the Beixi of Jiulong River as an example for further analysis, the riverbed in the lower reaches of the river has a smaller riverbed slope and larger water passing area. The relationships between cross-sectional flow velocity, the water depth of the main channel, the water surface width and the percentage of annual average flow were relatively flat, which was not possible to regard 10% of the average annual flow as a key or lower limit for river health. Tennant method, calculating ecological base flow with the combination of multi-year average flow and percentage, is not applicable for rivers in the southeast coast of China.