甘肃省苦咸水资源量及时空分布规律研究

通过实测资料对甘肃省苦咸水资源进行评价,得出了苦咸水资源的数量、地域分布、在全省水资源总量中所占的比重、影响人口等。分析了苦咸水的成因,论证了苦咸水在空间分布上与降水、蒸发和干旱指数等气候因素之间的相关关系,提出降水量430 mm左右为黄土高原区苦咸水与淡水的分界线。通过构建箱体概念模型,分析导出了黄土高原干旱\,半干旱区小流域矿化度的时空演变数学模型,从宏观上揭示了径流矿化度的时空演变规律和趋势,提出苦咸水流域的治理和水资源的开发利用思路。

Bitter-Salty Water Resources Amount and its Distribution in Gansu Province

Based on the historical measured data of water resources, the authors evaluated the bitter-salty water resources in Gansu province. Some characteristics such as the bitter-salty water resources quantity, regional distribution, proportion to the provincial total, and suffered population, were analyzed. Its regional distribution has close relation with precipitation, evaporation and arid index. The isoline of 430 mm precipitation could be regarded as the dividing line between fresh water and bitter-salty water on the Loess Plateau. A box conceptual model about water-salt balance in closed basin was established, from which a mathematical model about water salinity evolution in space-time has been deduced. The model can disclose the law of runoff salinity evolution in space-time in the arid and semi-arid small river basin on Loess Plateau, and the result can guide the bitter-salty water treatment and water resources development.