LEWen-cai,ZHANGYu,LIUQing,et al.Design of Paddy Wetland and Its Operation Performance in the Yangtze River Basin[J].China Water & Wastewater,2024,40(5):111-115.
Design of Paddy Wetland and Its Operation Performance in the Yangtze River Basin
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第5期
Page:
111-115
Column:
Date of publication:
2024-03-01
- Keywords:
- paddy wetland; Yangtze River basin; purification performance; water level design; ecological remediation
- Abstract:
- This paper monitored a paddy wetland with an area of about 190 hm2 around Chao Lake for one year to explore the key design points and comprehensive operation performance of paddy wetland in the Yangtze River basin. The paddy wetland demonstrated the annual reduction of 60.96 t, 101.50 t, 5.44 t and 692.30 t, and the average monthly removal rates of 39.36%-77.25%, 46.93%-73.74%, 45.61%-72.44% and 24.83%-43.15% for NH4+-N, TN, TP and COD, respectively. The effluent quality met the class Ⅳ limits specified in Environmental Quality Standards for Surface Water (GB 3838-2002), and the effluent quality from July to September reached the class Ⅲ surface water standard, indicating that the ecological environment was significantly improved, and the biodiversity was gradually enriched. The purification performance of the paddy wetland varied with the season, water level and rice planting and growth. During the rotary tillage period in April and the rice harvesting period in October, the paddy wetland ran at low water level, and the water purification performance was poor. During the rice growth period from May to September, the paddy wetland ran at medium and high water levels, and the water purification performance gradually improved and reached the best with the increase of temperature. From November to March, the paddy wetland ran at medium and high water levels, and the water purification performance was relatively stable.
Last Update:
2024-03-01