Water Conservation Function of Mountainous City in Western Yunnan: A Case Study of Baoshan City

CHEN Wenhua1, XU Juan1,†, LI Shuangcheng2

1. School of Resources and Environment, Baoshan University, Baoshan 678000; 2. College of Urban and Environmental Sciences, Peking University, Beijing 100871; † Corresponding author, E-mail: xjuane@163.com

Abstract Taking Baoshan City of Yunnan Province as an example, the spatial distribution of regional water conservation function was evaluated based on Budyko water balance model using the global monthly precipitation, temperature data (900 m resolution), MOD17A3 NPP data and HWSD-V1.2 soil data. The results show that the spatial distribution of water conservation is mainly affected by the uneven spatial distribution of precipitation, and the barrier of Gaoligong Mountain plays an important role in water vapor distribution. The unit water conservation and total water conservation of different land types are forest > shrub grassland > cultivated land > water area > construction land. It is very important to enhance the ability of forest conservation. The most important area of water conservation in the study area accounts for 14% of the total area and is concentrated in the west side of Gaoligong Mountain. The water conservation capacity of most areas in the east side is relatively low, which exerts much stress on water conservation. Key words water conservation; mountainous city; climate change; land cover

水以多种方式影响着人类生活的诸多方面。作为重要的战略资源, 水与社会经济发展紧密相关,是维系人类可持续发展的重要命脉。然而, 在全球气候变化的背景下, 人类活动加上各种灾害的频繁发生, 使得区域水文过程产生深刻的变化, 水资源安全格局的构建和维护逐渐成为社会各界关注的

热点[1–2]。

水资源安全格局指土地覆被‒利用格局中保障区域人类社会合理用水, 以及维持自然生态过程和功能的生态用水有关的特定景观类型或关键空间位

[3–4]置 。例如,水源地保护区、水源涵养功能区以及淡水存储库(湖泊、湿地、河流等水体)等的分