Salt drainage from farmlands can potentially degrade the ecological function of ditch wetlands in arid and semi-arid irrigation areas. However, such ditch wetlands may accept different quantities and salt concentrations of upstream inflows, which may have positive or negative effects on the water and salt dynamics of ditch wetland systems and, therefore, on the associated water and salt management measures. In this paper, we propose a new theoretical analysis model that enables us to study the influence of different upstream inflows on the water–salt dynamics and drainage strategies for ditch wetland in the study area. The research carried out by us has revealed that upstream inflow is one of the most important factors influencing ditch wetlands under the current conditions. An increase in salinity or a decrease in flow will negatively affect the ecology of the ditch wetland. In contrast, which will improve the ditch wetland environment. Nevertheless, wetlands are more sensitive to changes in salinity than to the volume of upstream inflow. Based on the combined effects of the salinity and quantity of its inflow on the wetlands, it can be divided into four categories: no-risk, low-risk, medium-risk, and high-risk. The inflow with no risk and low risk will have a positive effect on the ditch wetland system and drainage management, while medium-risk and high-risk conditions will increase the difficulty of drainage management, These results provide the insights needed to guide the design of drainage management practices for ditch wetlands in semi-arid regions that receive upstream inflows to maximize the benefits to the agricultural system and the environment.

农田中的盐分流失可能会降低干旱和半干旱灌溉区沟渠湿地的生态功能。但是，这种沟渠湿地可能接受上游流入量和盐浓度不同，这可能对沟渠湿地系统的水和盐动态产生积极或消极的影响，因此对相关的水盐管理措施也有正面或负面影响。在本文中，我们提出了一种新的理论分析模型，使我们能够研究不同上游水流对研究区沟渠湿地水盐动力学和排水策略的影响。我们进行的研究表明，在当前条件下，上游入流是影响沟渠湿地的最重要因素之一。盐度的增加或流量的减少将对沟渠湿地的生态产生不利影响。相反，这将改善沟渠湿地环境。然而，湿地对盐度的变化比对上游流入量更敏感。根据盐度和流入量对湿地的综合影响，可将其分为四类：无风险，低风险，中风险和高风险。无风险和低风险的流入将对沟渠湿地系统和排水管理产生积极影响，而中风险和高风险条件将增加排水管理的难度，