In this paper, experimental and numerical studies have been carried out in the design of the checkerboard sand barrier belt (CSBB) in anti-desertification project. Field observations show that the dune speed after CSBB was significantly reduced when checkerboard sand barriers were laid. The closer to the edge of CSBB, the more obvious the decrease of dune speed after CSBB is, the reduction rate of propagation speed of the edge of desertified land (δ = 1 − v/v_no, here, v is the propagation speed of the edge of desertified land with CSBB, v_no is the propagation speed of the edge of desertified land without CSBB) is about 0.7 at 200 m after CSBB. When the width and spacing are respectively 400 m and 700 m, CSBB can achieve the full paving effect, which confirms the effectiveness of the laying scheme of “strip patterns” (SP) proposed by Bo and Zheng (2013). Based on the model proposed by Bo and Zheng (2013), the optimal sizes of the spacing and width of CSBB (S_max and W₀) were found, and the expression of degradation length (DL) of CSBB with time, annual wind regime and wind speed is given. Moreover, a laying method for CSBB is given, i.e., the width (W) and spacing (S) of CSBB should satisfy $\text{W}>DL+{\text{W}}_0$ and $\text{S}<S_{\text{max}}-DL$. This laying design can save the laying cost and laying period to some extent, which provide guidance for the optimal design of CSBB in anti-desertification project.

本文针对防沙治沙工程中的棋盘格防沙带（CSBB）的设计进行了实验和数值研究。现场观察表明，铺设棋盘式防沙层后，CSBB后的沙丘速度明显降低。越接近CSBB的边缘，沙丘速度降低的幅度越明显，沙化土地边缘的传播速度降低率（δ= 1-  v / v _no，这里，v是CSBB在荒漠土地的边缘，v_否是没有CSBB的沙漠化土地边缘的传播速度）在CSBB之后200 m处约为0.7。当宽度和间距分别为400 m和700 m时，CSBB可以达到完全铺装效果，这证实了Bo和Zheng（2013）提出的“带状花纹”（SP）敷设方案的有效性。根据Bo and Zheng（2013）提出的模型，找到了CSBB的间距和宽度的最佳尺寸（S _max和W ₀），以及CSBB的降解长度（DL）随时间，年风量的表达并给出风速 此外，给出了CSBB的铺设方法，即CSBB的宽度（W）和间距（S）应满足$\text{w ^}>d\mathrm{大号}+{\text{w ^}}_0$ 和 $\text{小号}<{\mathrm{小号}}_{\text{最高}}--d\mathrm{大号}$。这种敷设设计可以在一定程度上节省敷设成本和敷设时间，为防沙项目中CSBB的优化设计提供指导。