CalGW Update 2020 - Mann-Kendall GW Level...
This zipped dataset includes an excel file and an ArcGIS shapefile for the Mann-Kendall Groundwater Level Trends between 1998 and 2018. This dataset was used to create Figure 6-5.
Groundwater levels at selected wells were analyzed using the Mann-Kendall non-parametric test to determine whether a statistically significant trend (declining trend, no trend, or increasing trends in groundwater levels) was present during the specified time period. A 21-year analysis period (1998 through 2018) was selected. The data used came only from wells that have at least 10 years of data within the 1998–2018 time period. This period includes the dry periods of 2001–2002, 2007–2009, and 2012–2016; and wet periods of 1998–2000, 2005–2006, 2011, and 2017 that were as defined by water year types according to Sacramento River and San Joaquin River indices. If a statistically significant trend was observed, the Theil-Sen method was used to calculate the estimated slope of the trend line to quantify the decline or increase.
Source: California's Groundwater Update 2020 (Bulletin 118)
About this Resource
| Last updated | unknown |
|---|---|
| Created | unknown |
| Name | CalGW Update 2020 - Mann-Kendall GW Level Trends (1998-2018) |
| Format | Zip File |
| License | License not specified |
| Created | 2 months ago |
| Media type | application/zip |
| has views | False |
| id | ff4f06c0-587a-480a-b583-7ee0dd82b65b |
| metadata modified | 2 months ago |
| package id | 024f4329-2d06-4277-bfd1-d21ac2175adc |
| position | 26 |
| state | active |
| tracking summary | {'total': 6, 'recent': 2} |